TRANSCO ENERGY CO
SC 13D/A, 1995-02-23
NATURAL GAS TRANSMISSION
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<PAGE>   1
                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                  SCHEDULE 13D

                   Under the Securities Exchange Act of 1934
                               (Amendment No. 8)

                             TRANSCO ENERGY COMPANY
                                (Name of Issuer)

                    Common stock, par value $0.50 per share
             (Including the attached common share purchase rights)
                        (Title of Class and Securities)

                                    89353210
                     (CUSIP Number of Class of Securities)

                                J. Furman Lewis
                   Senior Vice President and General Counsel
                          The Williams Companies, Inc.
                              One Williams Center
                             Tulsa, Oklahoma 74172
                                 (918) 588-2000
            (Name, Address and Telephone Number of Person Authorized
                     to Receive Notices and Communications)

                                    Copy to:

                             Randall H. Doud, Esq.
                      Skadden, Arps, Slate, Meagher & Flom
                                919 Third Avenue
                            New York, New York 10022
                                 (212) 735-3000

                               February 17, 1995
                         (Date of Event which Requires
                           Filing of this Statement)

If the filing person has previously filed a statement on Schedule 13G to report
the acquisition which is the subject of this Schedule 13D, and is filing this
schedule because of Rule 13d-1(b)(3) or (4), check the following:           / /

Check the following box if a fee is being paid with this Statement:         / /



                               Page 1 of 4 Pages


<PAGE>   2



     This Amendment No. 8 amends and supplements the Schedule 13D (the "Schedule
13D") dated December 16, 1994, as amended, originally filed in connection with
the tender offer (the "Offer") by The Williams Companies, Inc., a Delaware
corporation (the "Purchaser"), to purchase up to 24,600,000 of the outstanding
shares of common stock, par value $0.50 per share (and the attached common share
purchase rights), of Transco Energy Company, a Delaware corporation (the
"Company"). Unless otherwise defined herein, all terms used herein shall have
the meanings set forth in the Schedule 13D as previously amended including
Exhibit 1, the Offer to Purchase, dated December 16, 1994, filed by the
Purchaser with respect to the Offer.

Item 4 of the Schedule 13D is hereby amended to add the following:

Item 4.  Purpose of Transaction.

(a)-(j) On February 17, 1995, the Company gave notice to the holders of the
Company $4.75 Preferred Stock of the Company's intention to redeem all
outstanding shares of such stock on March 20, 1995, at the price of $50.475 per
share plus accrued dividends. On the same date, the Purchaser and the Company
amended and restated the Merger Agreement to reflect (i) such call for
redemption, (ii) the financing of such redemption by the issuance of a new
series of preferred stock of the Company to the Purchaser or capital
contributions or loans by the Purchaser and (iii) certain other technical
changes.

     In addition, also on February 17, the Company concluded a cash tender offer
(the "Company Notes Offer") for the Company Notes, of which $300,000,000 in
principal amount were outstanding prior to commencement of the Company Notes
Offer. An aggregate principal amount of $284,004,000 of Company Notes were
tendered to and accepted by the Company pursuant to the Company Notes Offer,
which was commenced on February 10, 1995.

     Prior to commencement of the Company Notes Offer, the holders of a majority
in aggregate principal amount of the Company Notes outstanding (the "Majority
Holders") executed a Consent and Waiver, dated as of February 9, 1995 (the
"Consent and Waiver"), pursuant to which the Majority Holders consented to (i) a
waiver (the "Waiver") of certain provisions of the Indenture under which the
Company Notes were issued (the "Indenture") and (ii) certain amendments to the
Indenture to eliminate most of the restrictive covenants contained therein (the
"Amendments"). The consents granted under the Consent and Waiver were sufficient
to waive certain provisions of the Indenture and to amend the Indenture (the
Indenture as so amended, the "Amended Indenture"). The Company Notes which were
not tendered in the Company Notes Offer will remain outstanding and be subject
to the terms of the Amended Indenture. The principal purposes of the Waiver and
the

                               Page 2 of 4 Pages


<PAGE>   3



Amendments are to permit the dividend by the Company of the stock of certain of
the Company's operating subsidiaries to the Purchaser, to permit redemption of
TGPL's outstanding preferred stock and to provide the Company with additional
operating flexibility following the Merger.

     On February 20, 1995, TGPL announced that it will redeem 10,000 shares of
its $4.80 series cumulative preferred stock, 37,444 shares of its $6.65 series
cumulative preferred stock, and 450,000 shares of its $8.75 series cumulative
preferred stock, which represents all of the outstanding shares of each such
series of preferred stock. The redemption will be effective March 23, 1995, at a
redemption price of $100.00 per share plus accrued dividends for each share of
each such series of preferred stock.

Item 7 of the Schedule 13D is hereby amended to add the following exhibit:

Exhibit 6.    Amendment to Agreement and Plan of Merger, dated as of February
              17, 1995.

                               Page 3 of 4 Pages


<PAGE>   4



                                   SIGNATURE

     After reasonable inquiry and to the best of my knowledge and belief, I
certify that the information set forth in this statement is true, complete and
correct.

Dated:  February 23, 1995

                                       THE WILLIAMS COMPANIES, INC.

                                       By: /s/  J. FURMAN LEWIS        
                                           --------------------------
                                           Name:  J. Furman Lewis
                                           Title: Senior Vice President
                                                  and General Counsel

                               Page 4 of 4 Pages


<PAGE>   5
                                EXHIBIT INDEX
                                -------------



Exhibit 6.      Amendment to Agreement and Plan of Merger,
                dated as of February 17, 1995











<PAGE>   1



                                                                       Exhibit 6

                                  AMENDMENT TO

                          AGREEMENT AND PLAN OF MERGER

     AMENDMENT, dated as of February 17, 1995, to the Agreement and Plan of
Merger, dated as of December 12, 1994 (the "Merger Agreement"), by and among The
Williams Companies, Inc., a Delaware corporation ("Parent"), WC Acquisition
Corp., a Delaware corporation and a wholly owned subsidiary of Parent ("Sub"),
and Transco Energy Company, a Delaware corporation (the "Company"). All
capitalized terms not defined herein shall have the meanings ascribed in the
Merger Agreement.

     WHEREAS, the parties hereto desire to amend and restate the Merger
Agreement to reflect, among other things, the Company's call for redemption on
March 20, 1995 of all outstanding shares of the Company's $4.75 series
Cumulative Convertible Preferred Stock, such redemption to be financed by the
issuance of a new series of preferred stock of the Company to Parent or capital
contributions or loans by Parent;

     NOW, THEREFORE, in consideration of the foregoing the parties hereto agree
as follows:

     1. The Merger Agreement is hereby amended and restated in the form
attached hereto as Exhibit A (the "Restated Merger Agreement").

     2. Schedule 6.10(b)(i) is hereby amended and restated in the form
previously agreed between the parties hereto.

     3. This Amendment may be executed in two or more counterparts, all of which
will be considered one and the same agreement and will become effective when two
or more counterparts have been signed by each of the parties and delivered to
the other parties, it being understood that all parties need not sign the same
counterpart.


<PAGE>   2


     IN WITNESS WHEREOF, the parties hereto have executed this Amendment as of
the date first above written.

                                       THE WILLIAMS COMPANIES, INC.

                                       BY: /s/ J. FURMAN LEWIS
                                           -------------------------- 
                                       
                                       WC ACQUISITION CORP.

                                       BY: /s/ J. FURMAN LEWIS
                                           --------------------------
                                       
                                       TRANSCO ENERGY COMPANY

                                       BY: /s/ JOHN P. DESBARRES
                                           --------------------------


<PAGE>   3
 
                                                                       EXHIBIT A

===============================================================================
 
                         AGREEMENT AND PLAN OF MERGER*
 
                         DATED AS OF DECEMBER 12, 1994
 
                                  BY AND AMONG
 
                         THE WILLIAMS COMPANIES, INC.,
 
                              WC ACQUISITION CORP.
 
                                      AND
 
                             TRANSCO ENERGY COMPANY

=============================================================================== 
- ---------------
 
*As amended.
<PAGE>   4
 
                               TABLE OF CONTENTS
 
<TABLE>
<CAPTION>
                                                                                      PAGE(S)
                                                                                      -------
<S>                                                                                   <C>
ARTICLE I
  THE TENDER OFFER..................................................................      1
     Section 1.1   The Offer........................................................      1
     Section 1.2   Company Action...................................................      2
ARTICLE II
  THE MERGER........................................................................      3
     Section 2.1   Effective Time of the Merger.....................................      3
     Section 2.2   Closing..........................................................      3
     Section 2.3   Effects of the Merger............................................      3
     Section 2.4   Certificate of Incorporation and By-Laws.........................      3
     Section 2.5   Directors........................................................      3
     Section 2.6   Officers.........................................................      4
ARTICLE III
  CONVERSION OF SECURITIES; DISSENTING SHARES.......................................      4
     Section 3.1   Conversion of Capital Stock......................................      4
     Section 3.2   Exchange of Certificates and Cash................................      5
     Section 3.3   Dissenting Shares................................................      7
ARTICLE IV
  REPRESENTATIONS AND WARRANTIES OF THE COMPANY.....................................      7
     Section 4.1   Organization.....................................................      7
     Section 4.2   Capitalization...................................................      8
     Section 4.3   Authority........................................................      9
     Section 4.4   Consents and Approvals; No Violations............................      9
     Section 4.5   SEC Reports and Financial Statements.............................     10
     Section 4.6   Information in Disclosure Documents and Registration Statement...     11
     Section 4.7   Litigation.......................................................     11
     Section 4.8   No Material Adverse Change; Material Agreements..................     11
     Section 4.9   Taxes............................................................     12
     Section 4.10  Opinion of Financial Advisor.....................................     13
     Section 4.11  Company Rights Agreement.........................................     13
     Section 4.12  DGCL Section 203.................................................     13
     Section 4.13  Change in Control Provisions.....................................     13
     Section 4.14  Vote Required....................................................     13
ARTICLE V
  REPRESENTATIONS AND WARRANTIES OF PARENT AND SUB..................................     13
     Section 5.1   Organization.....................................................     13
     Section 5.2   Capitalization...................................................     14
     Section 5.3   Authority........................................................     15
     Section 5.4   Consents and Approvals; No Violations............................     15
     Section 5.5   SEC Reports and Financial Statements.............................     16
     Section 5.6   Information in Disclosure Documents and Registration Statement...     16
     Section 5.7   Litigation.......................................................     17
     Section 5.8   No Material Adverse Change; Material Agreements..................     17
     Section 5.9   Taxes............................................................     17
     Section 5.10  Parent Not an Interested Stockholder or an Acquiring Person......     18
     Section 5.11  Interim Operations of Sub........................................     18
</TABLE>
 
                                        i
<PAGE>   5
 
<TABLE>
<CAPTION>
                                                                                      PAGE(S)
                                                                                      -------
<S>                                                                                   <C>
     Section 5.12  Financing........................................................     18
     Section 5.13  Purchase of Option Shares........................................     18
ARTICLE VI
  COVENANTS.........................................................................     18
     Section 6.1   Conduct of Business of the Company...............................     18
     Section 6.2   Conduct of Business of Parent....................................     20
     Section 6.3   Reasonable Best Efforts..........................................     20
     Section 6.4   Letter of the Company's Accountants..............................     21
     Section 6.5   Letter of Parent's Accountants...................................     21
     Section 6.6   Access to Information............................................     21
     Section 6.7   Company Stockholders Meeting.....................................     21
     Section 6.8   Stock Exchange Listing...........................................     21
     Section 6.9   Company Plans....................................................     21
     Section 6.10  Other Employee Benefit Plans.....................................     23
     Section 6.11  Exclusivity......................................................     24
     Section 6.12  Fees and Expenses................................................     24
     Section 6.13  Brokers or Finders...............................................     24
     Section 6.14  Company Rights Agreement.........................................     25
     Section 6.15  Rule 145.........................................................     25
     Section 6.16  Notification of Certain Matters..................................     25
     Section 6.17  Interim Company Preferred Stock Dividend.........................     25
     Section 6.18  Company Debt Agreements..........................................     25
ARTICLE VII
  CONDITIONS........................................................................     26
     Section 7.1   Conditions to Each Party's Obligation To Effect the Merger.......     26
     Section 7.2   Conditions of Obligations of Parent and Sub......................     26
     Section 7.3   Conditions of Obligations of the Company.........................     26
ARTICLE VIII
  TERMINATION AND AMENDMENT.........................................................     27
     Section 8.1   Termination......................................................     27
     Section 8.2   Effect of Termination............................................     27
ARTICLE IX
  MISCELLANEOUS.....................................................................     28
     Section 9.1   Nonsurvival of Representations and Warranties....................     28
     Section 9.2   Amendment........................................................     28
     Section 9.3   Extension; Waiver................................................     28
     Section 9.4   Notices..........................................................     28
     Section 9.5   Interpretation...................................................     29
     Section 9.6   Counterparts.....................................................     29
     Section 9.7   Entire Agreement; No Third Party Beneficiaries...................     29
     Section 9.8   Governing Law....................................................     29
     Section 9.9   Specific Performance.............................................     30
     Section 9.10  Publicity........................................................     30
     Section 9.11  Assignment.......................................................     30
     Section 9.12  Validity.........................................................     30
     Section 9.13  Taxes............................................................     30
</TABLE>
 
                                       ii
<PAGE>   6
 
                           SCHEDULE OF DEFINED TERMS
 
<TABLE>
<CAPTION>
DEFINED TERM                                                                        SECTION                         
- ------------                                                                        -------
<S>                                                                                 <C>
Acquisition Transaction...........................................................  6.11(a)
Agreement.........................................................................  Preamble
Certificate of Merger.............................................................  2.1
Certificates......................................................................  3.2(b)
Certificates of Designation.......................................................  3.1(c)
Closing...........................................................................  2.2
Closing Date......................................................................  2.2
Code..............................................................................  3.2(h)
Common Stock Merger Consideration.................................................  3.2(b)
Company...........................................................................  Preamble
Company Common Stock..............................................................  Preamble
Company Cumulative Preferred Stock................................................  4.2
Company Disclosure Schedule.......................................................  4.2
Company Notes.....................................................................  6.1(e)
Company Plans.....................................................................  4.2
Company Preferred Stock...........................................................  3.1(c)
Company Rights....................................................................  4.2
Company Rights Agreement..........................................................  4.2
Company SEC Documents.............................................................  4.5
Company Stock Option..............................................................  6.9(b)
Confidentiality Agreement.........................................................  6.6
Conversion Number.................................................................  3.1(d)
Corpus Christi Lease..............................................................  4.2
Current Employees.................................................................  6.10(a)
DGCL..............................................................................  2.1
Dissenting Shares.................................................................  3.3
Effective Time....................................................................  2.1
Exchange Act......................................................................  1.2(a)
Exchange Agent....................................................................  3.2(a)
Exchange Fund.....................................................................  3.2(a)
Governmental Entity...............................................................  4.4(a)
HSR Act...........................................................................  4.4(a)
IRS...............................................................................  4.9(a)
Material Company Subsidiary.......................................................  4.1(b)
Material Parent Subsidiary........................................................  5.1(b)
Merger............................................................................  Preamble
Merger Consideration..............................................................  3.2(b)
NYSE..............................................................................  1.1(a)
Offer.............................................................................  Preamble
Offer Documents...................................................................  1.1(b)
Offer to Purchase.................................................................  1.1(a)
Parent............................................................................  Preamble
Parent Common Stock...............................................................  3.1(d)
Parent Disclosure Schedule........................................................  5.9
Parent New Preferred stock........................................................  3.1(c)
Parent Plans......................................................................  5.2
</TABLE>
 
                                       iii
<PAGE>   7
 
<TABLE>
<CAPTION>
DEFINED TERM                                                                         SECTION
- ------------                                                                         -------
<S>                                                                                 <C>
Parent Preferred Stock............................................................  5.2
Parent Rights.....................................................................  5.2
Parent Rights Agreement...........................................................  5.2
Parent SEC Documents..............................................................  5.5
Per Share Amount..................................................................  Preamble
Person............................................................................  6.11(a)
Preferred Stock Merger Consideration..............................................  3.2(b)
Proxy Statement...................................................................  4.6(c)
Replacement Option................................................................  6.9(c)
S-4...............................................................................  4.6(b)
SAS...............................................................................  6.4
Schedule 14D-1....................................................................  1.1(b)
Schedule 14D-9....................................................................  1.2(a)
SEC...............................................................................  1.1(b)
Securities Act....................................................................  4.4(a)
Stock Option Agreement............................................................  Preamble
Sub...............................................................................  Preamble
Subsidiary........................................................................  3.1(b)
Subsidiary Preferred Stock........................................................  4.2
Surviving Corporation.............................................................  Preamble
Tax Return........................................................................  4.9(b)
Taxes.............................................................................  4.9(b)
TIA...............................................................................  4.4(a)
Voting Debt.......................................................................  4.2
</TABLE>
 
                                       iv
<PAGE>   8
 
                          AGREEMENT AND PLAN OF MERGER
 
     AGREEMENT AND PLAN OF MERGER, dated as of December 12, 1994 (this
"Agreement"), by and among The Williams Companies, Inc., a Delaware corporation
("Parent"), WC Acquisition Corp., a Delaware corporation and a wholly owned
subsidiary of Parent ("Sub"), and Transco Energy Company, a Delaware corporation
(the "Company").
 
     WHEREAS, the respective Boards of Directors of Parent and the Company have
determined that the acquisition of the Company by Parent would be advantageous
and beneficial to their respective corporations and stockholders, and that such
transaction is consistent with and in furtherance of such entities' respective
long-term business strategies;
 
     WHEREAS, in furtherance thereof, it is proposed that Parent will make a
cash tender (the "Offer") to acquire up to 24,600,000 shares of the Company's
common stock, par value $.50 per share (the "Company Common Stock"), together
with attached Company Rights (as defined in Section 4.2), for $17.50 per share
of Company Common Stock (and attached Right) (such amount, or any greater amount
per share pursuant to the Offer, being hereinafter referred to as the "Per Share
Amount"), net to the seller in cash, in accordance with the terms and subject to
the conditions provided herein and in the Offer Documents (as defined in Section
1.1(b));
 
     WHEREAS, it is proposed that, following consummation of the Offer, there be
a merger of Sub with and into the Company (the "Merger") with the Company
surviving as a subsidiary of Parent (the "Surviving Corporation"); and
 
     WHEREAS, as a condition to the willingness of Parent to enter into this
Agreement, Parent has required that the Company agree, and in order to induce
Parent to enter into this Agreement, the Company has entered into concurrently
with the execution of this Agreement a Stock Option Agreement (the "Stock Option
Agreement") providing for a grant of an option to Parent to purchase, at a per
share price of $17.50 per share and otherwise upon the terms and conditions
provided for therein, up to 7,500,000 shares of Company Common Stock.
 
     NOW, THEREFORE, in consideration of the foregoing and the respective
representations, warranties, covenants and agreements set forth herein, the
parties hereto agree as follows:
 
                                   ARTICLE I
 
                                THE TENDER OFFER
 
     Section 1.1 The Offer.
 
     (a) Provided that this Agreement has not been terminated in accordance with
Section 8.1, Parent will commence the Offer as promptly as practicable after the
date hereof, but in no event later than December 16, 1994. The obligation of
Parent to accept for payment any shares of Company Common Stock (and attached
Company Rights) tendered pursuant to the Offer will be only subject to the
satisfaction of the conditions set forth in Annex I hereto. Parent expressly
reserves the right to (i) increase the Per Share Amount or (ii) increase on one
occasion the number of shares of Company Common Stock (and attached Company
Rights) to be purchased in the Offer; provided, that (x) any increase in the
number of shares to be purchased which requires an extension of the Offer beyond
its then applicable expiration date in accordance with applicable law must
provide for an increase of at least 4,000,000 shares and (y) any increase in the
number of shares sought at a time when the average closing sale prices on the
New York Stock Exchange (the "NYSE") for shares of Parent Common Stock (as
defined in Section 3.1(d)) for the ten trading days immediately preceding the
date of public notice of the increase exceeds $28.00 may only be made with the
consent of the Company. Without the prior written consent of the Company, Parent
will not (i) decrease the Per Share Amount, (ii) decrease or (other than as
permitted by the immediately preceding sentence) increase the number of shares
of Company Common Stock to be purchased in the Offer, (iii) change the form of
consideration payable in the Offer, (iv) add to or change the conditions to the
Offer set forth in Annex I hereto, (v) change or waive the Minimum Condition (as
defined in Annex I hereto) or (vi) make any other
<PAGE>   9
 
change in the terms or conditions of the Offer which is adverse to the holders
of shares of Company Common Stock. The conditions set forth in Annex I are for
the benefit of Parent, and may be asserted by Parent or, subject to the
immediately preceding sentence, may be waived by Parent, in whole or in part, at
any time and from time to time in its discretion. The Offer will be made by
means of an offer to purchase (the "Offer to Purchase") containing the terms set
forth in this Agreement and only the conditions set forth in Annex I hereto.
Subject to the terms of the Offer and this Agreement and the satisfaction of all
the conditions of the Offer set forth in Annex I hereto as of any expiration
date, Parent will accept for payment and pay for all shares of Company Common
Stock (and attached Company Rights) validly tendered and not withdrawn pursuant
to the Offer as soon as practicable after such expiration date of the Offer.
Subject to Section 8.1, if the conditions set forth in Annex I hereto are not
satisfied or, to the extent permitted by this Agreement, waived by Parent, as of
the date the Offer would otherwise have expired, Parent will extend the Offer
from time to time until the earlier of the consummation of the Offer or the date
which is 90 days from the commencement of the Offer.
 
     (b) On the date of commencement of the Offer, Parent will file with the
Securities and Exchange Commission (the "SEC") a Tender Offer Statement on
Schedule 14D-1 (together with all amendments and supplements thereto, the
"Schedule 14D-1") with respect to the Offer. The Schedule 14D-1 will contain
(including as an exhibit) or will incorporate by reference the Offer to Purchase
(or portions thereof) and forms of the related letter of transmittal and summary
advertisement (which Schedule 14D-1, Offer to Purchase and other documents,
together with any supplements or amendments thereto, are referred to herein
collectively as the "Offer Documents"). Parent will disseminate the Offer to
Purchase, related Letter of Transmittal and other related Offer Documents to
holders of shares of the Company Common Stock. Each of Parent and the Company
will promptly correct any information provided by it for use in the Offer
Documents that becomes false or misleading in any material respect and Parent
will take all steps necessary to cause the Schedule 14D-1 as so corrected to be
filed with the SEC and the other Offer Documents as so corrected to be
disseminated to holders of shares of Company Common Stock, in each case as and
to the extent required by applicable law. Parent will provide the Company and
its counsel in writing with any comments Parent or its counsel may receive from
the SEC or its staff with respect to the Offer Documents promptly after the
receipt of such comments. Parent and its counsel will provide the Company and
its counsel with a reasonable opportunity to participate in all communications
with the SEC and its staff, including any meetings and telephone conferences
relating to the Offer Documents, the Offer, the Merger or this Agreement.
 
     Section 1.2 Company Action.
 
     (a) The Company hereby consents to the Offer. The Company will file with
the SEC, as promptly as practicable after the filing by Parent of the Schedule
14D-1, a Solicitation/Recommendation Statement on Schedule 14D-9 (the "Schedule
14D-9") reflecting the recommendation of the Company's Board of Directors that
holders of shares of Company Common Stock tender their shares pursuant to the
Offer and will disseminate the Schedule 14D-9 as required by Rule 14d-9
promulgated under the Securities Exchange Act of 1934, as amended (the "Exchange
Act"), subject to the fiduciary duties of the Board of Directors of the Company
under applicable laws as advised by counsel. Each of the Company and Parent will
promptly correct any information provided by it for use in the Schedule 14D-9
that becomes false or misleading in any material respect, and the Company will
further take all steps necessary to cause the Schedule 14D-9 as so corrected to
be filed with the SEC and disseminated to holders of shares of Company Common
Stock, in each case as and to the extent required by applicable law. The Company
will provide Parent and its counsel in writing with any comments the Company or
its counsel may receive from the SEC or its staff with respect to the Schedule
14D-9 promptly after the receipt of such comments. The Company and its counsel
will provide Parent and its counsel with a reasonable opportunity to participate
in all communications with the SEC and its staff, including any meetings and
telephone conferences relating to the Schedule 14D-9, the Merger or this
Agreement.
 
     (b) The Company will (i) promptly furnish Parent with mailing labels
containing the names and addresses of all record holders of shares of Company
Common Stock as of a recent date and of those persons becoming record holders
after such date, together with copies of all security position listings and
computer files and all other information in the Company's control regarding the
beneficial owners of shares of Company
 
                                        2
<PAGE>   10
 
Common Stock that Parent may reasonably request and (ii) furnish to Parent such
other assistance as Parent or its agents may reasonably request in communicating
the Offer to holders of shares of Company Common Stock.
 
     (c) Subject to the requirements of law, and except for such steps as are
necessary to disseminate the Offer Documents, Parent will, and will cause each
of its subsidiaries to, hold in confidence the information contained in any of
such labels and lists, use such information only in connection with the Offer
and, if this Agreement is terminated, deliver to the Company all copies of, and
extracts or summaries from, such information then in their possession.
 
     (d) Effective upon payment by Parent for all shares of Company Common Stock
accepted for payment pursuant to the Offer, Parent will be entitled to designate
two directors on the Company's Board of Directors, and the Company will take all
action necessary to cause Parent's designees to be elected or appointed to the
Company's Board of Directors, including, without limitation, increasing the
number of directors or seeking and accepting resignations of incumbent
directors. Such designees will abstain from any action proposed to be taken by
the Company to amend or terminate this Agreement or waive any action by Parent,
which actions will be effective with the approval of a majority of the remaining
directors. Without the consent of the Company, Parent agrees not to effect any
other changes in the Board of Directors of the Company prior to the Effective
Time.
 
                                   ARTICLE II
 
                                   THE MERGER
 
     Section 2.1 Effective Time of the Merger.  Upon the terms and subject to
the conditions hereof, a certificate of merger (the "Certificate of Merger") and
the Certificates of Designation (as defined in Section 3.1(c)) will be duly
prepared, executed and acknowledged by the Surviving Corporation and thereafter
delivered to the Secretary of State of the State of Delaware, for filing as
provided in the Delaware General Corporation Law (the "DGCL"), as soon as
practicable on the Closing Date (as defined in Section 2.2). The Merger will
become effective upon the filing of the Certificate of Merger with the Secretary
of State of the State of Delaware (the "Effective Time").
 
     Section 2.2 Closing.  Unless this Agreement is terminated and the
transactions contemplated herein abandoned pursuant to Section 8.1 and assuming
the satisfaction or waiver of the conditions set forth in Article VII, the
closing of the Merger (the "Closing") will take place at 10:00 a.m. on a date to
be specified by the parties, which will be no later than the second business day
following the date of the meeting of the Company's stockholders called for the
purpose of voting on matters with respect to this Agreement (the "Closing
Date"), at the offices of Skadden, Arps, Slate, Meagher & Flom, 919 Third
Avenue, New York, New York 10022, unless another date or place is agreed to in
writing by the parties hereto.
 
     Section 2.3 Effects of the Merger.  The Merger will have the effects set
forth in the DGCL. Without limiting the generality of the foregoing, and subject
thereto, at the Effective Time, all the properties, rights, privileges, powers
and franchises of the Company and Sub will vest in the Surviving Corporation,
and all debts, liabilities and duties of the Company and Sub shall become the
debts, liabilities and duties of the Surviving Corporation.
 
     Section 2.4 Certificate of Incorporation and By-Laws.
 
     (a) The Restated Certificate of Incorporation of the Company in effect at
the Effective Time will be the Restated Certificate of Incorporation of the
Surviving Corporation, as amended and restated substantially in the form set
forth in Exhibit 2.4 hereto, until amended in accordance with applicable law.
 
     (b) The By-Laws of Sub in effect at the Effective Time will be the By-Laws
of the Surviving Corporation until amended in accordance with applicable law.
 
     Section 2.5 Directors.  The directors of Sub at the Effective Time will be
the initial directors of the Surviving Corporation, each to hold office from the
Effective Time in accordance with the Restated Certificate
 
                                        3
<PAGE>   11
 
of Incorporation and By-Laws of the Surviving Corporation and until his or her
successor is duly elected and qualified.
 
     Section 2.6 Officers.  The officers of the Company at the Effective Time
will be the initial officers of the Surviving Corporation, each to hold office
from the Effective Time in accordance with the Restated Certificate of
Incorporation and By-Laws of the Surviving Corporation and until his or her
successor is duly appointed and qualified.
 
                                  ARTICLE III
 
                  CONVERSION OF SECURITIES; DISSENTING SHARES
 
     Section 3.1 Conversion of Capital Stock.  As of the Effective Time, by
virtue of the Merger and without any action on the part of the holder of any
shares of capital stock of the Company or the holder of any capital stock of
Sub:
 
     (a) Each issued and outstanding share of the capital stock, par value $.01
per share, of Sub will be converted into and become one fully paid and
nonassessable share of Common Stock, par value $.01 per share, of the Surviving
Corporation.
 
     (b) All shares of capital stock of the Company that are owned by the
Company as treasury stock and any shares of Company Common Stock or Company
Preferred Stock owned by Parent, Sub or any other wholly owned Subsidiary (as
hereinafter defined) of Parent will be cancelled and retired and will cease to
exist and no stock of Parent or other consideration will be delivered in
exchange therefor. As used in this Agreement, the word "Subsidiary" means, with
respect to any party, any corporation or other organization, whether
incorporated or unincorporated, of which (i) such party or any other Subsidiary
of such party is a general partner (excluding partnerships, the general
partnership interests of which held by such party or any Subsidiary of such
party do not have a majority of the voting interest in such partnership) or (ii)
at least a majority of the securities or other interests having by their terms
ordinary voting power to elect a majority of the Board of Directors or others
performing similar functions with respect to such corporation or other
organization is directly or indirectly owned or controlled by such party, by any
one or more of its Subsidiaries, or by such party and one or more of its
Subsidiaries. References to a wholly owned subsidiary of an entity include a
subsidiary all of the common equity of which is owned directly or through
"wholly owned" subsidiaries by such entity.
 
     (c) Subject to Section 3.2(e), each issued and outstanding share of the
$3.50 series Cumulative Convertible Preferred Stock, stated value $50 per share
(the "Company Preferred Stock"), of the Company (other than shares to be
cancelled in accordance with Section 3.1(b) and Dissenting Shares) will be
converted into the right to receive (in accordance with Section 3.2(b)) one
share of preferred stock of Parent which will be designated Parent's $3.50
Series Cumulative Convertible Preferred Stock (the "Parent New Preferred Stock")
and be initially convertible into 1.5625 shares of Parent Common Stock and
otherwise have the designation, preferences and rights set forth in the Form of
Certificate of Designation, Preferences and Rights of Parent $3.50 Preferred
Stock attached hereto as Exhibit 3.1(c) (the "Certificate of Designation"). All
shares of Company Preferred Stock, when converted in accordance with this
Section 3.1(c), will no longer be outstanding and will automatically be
cancelled and retired and will cease to exist, and each holder of a certificate
representing any such shares will cease to have any rights with respect thereto,
except the right to receive the shares of Parent New Preferred Stock and any
cash or other property to be issued or paid in consideration therefor upon the
surrender of such certificate in accordance with Section 3.2, without interest,
and the right to receive any dividend which such holder is entitled to be paid
pursuant to Section 6.17.
 
     (d) Subject to Section 3.2(e), each issued and outstanding share of Company
Common Stock (other than shares to be cancelled in accordance with Section
3.1(b) and Dissenting Shares) will be converted into the right to receive (in
accordance with Section 3.2(b)) .625 of a share of Common Stock, $1.00 par value
per share (the "Parent Common Stock"), of Parent, (such fractional amount of a
share of Parent Common Stock, the "Conversion Number"). In the event that
between the date of this Agreement and the Effective Time the outstanding shares
of Company Common Stock or Parent Common Stock are changed into a
 
                                        4
<PAGE>   12
 
different number of shares or a different class, by reason of any stock
dividend, subdivision, reclassification, recapitalization, split, combination or
exchange of shares, the Conversion Number (and number of attached Parent
Rights), the conversion rates applicable to the shares of Parent New Preferred
Stock issuable in the Merger, and the amount of cash payable in respect of
fractional shares pursuant to Section 3.2(e) will be correspondingly adjusted to
reflect such stock dividend, subdivision, reclassification, recapitalization,
split, combination or exchange of shares. All shares of Company Common Stock,
when converted in accordance with this Section 3.1(d), will no longer be
outstanding and will automatically be cancelled and retired and will cease to
exist, and each holder of a certificate representing any such shares will cease
to have any rights with respect thereto, except the right to receive the shares
of Parent Common Stock (and attached Parent Rights) and any cash or other
property to be issued or paid in consideration therefor upon the surrender of
such certificate in accordance with Section 3.2, without interest.
 
     (e) Each issued and outstanding share of Company Cumulative Preferred Stock
(other than shares to be cancelled in accordance with Section 3.1(b)) owned by
Parent and outstanding at the Effective Time will remain outstanding immediately
following the Effective Time as one fully paid and nonassessable share of
Cumulative Preferred Stock of the Surviving Corporation.
 
     Section 3.2 Exchange of Certificates and Cash.
 
     (a) Promptly following the Effective Time, Parent will deposit, or will
cause to be so deposited, with First Chicago Trust Company of New York or
another bank or trust company designated by Parent and reasonably acceptable to
the Company (the "Exchange Agent") for the benefit of the holders of shares of
Company Common Stock and Company Preferred Stock (other than any Dissenting
Shares), certificates evidencing the shares of Parent Common Stock and Parent
New Preferred Stock payable or issuable pursuant to Section 3.1 in exchange for
outstanding shares of Company Common Stock and Company Preferred Stock, as the
case may be (such certificates, together with any cash or other dividends or
distributions declared or made, and any other cash or other property paid or
issued through redemption, merger or otherwise, with respect thereto, being
hereinafter collectively referred to as the "Exchange Fund"). Subject to Section
3.2(g), the Exchange Agent will deliver the shares of Parent Common Stock (and
attached Parent Rights) and Parent New Preferred Stock to holders of shares of
Company Common Stock and Company Preferred Stock, as the case may be (other than
any Dissenting Shares), in accordance with Section 3.2(b) and the Exchange Fund
will not be used for any other purpose. Except as contemplated by Section
3.2(c), any interest, dividends or other income earned on the investment of cash
or other property held in the Exchange Fund will be for the account of Parent.
 
     (b) As soon as practicable after the Effective Time, Parent will cause the
Exchange Agent to mail to each holder of record of a certificate or certificates
which immediately prior to the Effective Time represented outstanding shares of
Company Common Stock or Company Preferred Stock (the "Certificates") whose
shares were converted pursuant to Section 3.1 (i) a letter of transmittal (which
will be in such form and have such provisions as Parent and the Company may
reasonably specify) and (ii) instructions for use in effecting the surrender of
the Certificates in exchange for certificates representing shares of Parent
Common Stock (and attached Parent Rights) or Parent New Preferred Stock, as the
case may be. Upon surrender of a Certificate for cancellation to the Exchange
Agent or to such other agent or agents as may be appointed by Parent and Sub,
together with such letter of transmittal, duly executed, the holder of such
Certificate will be entitled to receive in exchange therefor (x) a certificate
representing that number of whole shares of Parent Common Stock (and attached
Parent Rights) or Parent New Preferred Stock, as the case may be, which such
holder has the right to receive pursuant to the provisions of this Article III,
and (y) cash in lieu of fractional shares of Parent Common Stock (and attached
Parent Rights) to which such holder is entitled pursuant to Section 3.2(e) (the
shares of Parent Common Stock (and attached Parent Rights) and cash described in
clauses (x) and (y) above being collectively referred to herein as the "Common
Stock Merger Consideration", the shares of Parent New Preferred Stock described
in clause (x) above being collectively referred to herein as the "Preferred
Stock Merger Consideration" and the Common Stock Merger Consideration and the
Preferred Stock Merger Consideration being collectively referred to herein as
the "Merger Consideration") and the Certificate so surrendered will forthwith be
cancelled. In the event of a transfer of ownership of Company Common Stock or
Company Preferred Stock which is not registered in the transfer records of the
 
                                        5
<PAGE>   13
 
Company, the certificates representing the proper number of shares of Parent
Common Stock (and attached Parent Rights) or Parent New Preferred Stock may be
paid or issued to a transferee if the Certificate representing such Company
Common Stock or Company Preferred Stock is presented to the Exchange Agent,
accompanied by all documents required to evidence and effect such transfer,
together with evidence that any applicable stock transfer taxes have been paid
and the payment of any required transfer taxes. Until surrendered as
contemplated by this Section 3.2, each Certificate will be deemed at any time
after the Effective Time to represent only the right to receive upon such
surrender the relevant Merger Consideration.
 
     (c) No dividends or other distributions declared or made, or any other cash
or other property paid or issued through redemption, merger or otherwise, after
the Effective Time with respect to shares of Parent Common Stock or Parent New
Preferred Stock with a record date after the Effective Time will be paid to the
holder of any unsurrendered Certificate with respect to the shares of Parent
Common Stock or Parent New Preferred Stock which such holder is entitled to
receive upon the surrender thereof in accordance with this Section 3.2. Subject
to the effect of applicable laws, following surrender of any such Certificate,
there will be paid to the record holder of the certificates representing whole
shares of Parent Common Stock or Parent New Preferred Stock issued in exchange
therefor, without interest, (i) the amount of dividends or other distributions,
or other cash or property paid or issued through redemption, merger or
otherwise, with a record date after the Effective Time theretofore paid or
issued with respect to such whole shares of Parent Common Stock or Parent New
Preferred Stock, and (ii) at the appropriate payment date, the amount of
dividends or other distributions, or other cash or property paid or issued
through redemption, merger or otherwise, with a record date after the Effective
Time but prior to such surrender and a payment date subsequent to surrender
payable with respect to such whole shares of Parent Common Stock or Parent New
Preferred Stock.
 
     (d) The Merger Consideration paid as provided above, together with any
dividends, other distributions or other property paid pursuant to Section
3.2(c), will be deemed to have been issued in full satisfaction of all rights
pertaining to such shares of Company Common Stock or Company Preferred Stock, as
the case may be, and there will be no further registration of transfers on the
stock transfer books of the Surviving Corporation of the shares of Company
Common Stock or Company Preferred Stock which were outstanding immediately prior
to the Effective Time. If, after the Effective Time, Certificates are presented
to the Surviving Corporation for any reason, they will be cancelled and
exchanged as provided in this Article III.
 
     (e) No certificate or scrip representing fractional shares of Parent Common
Stock will be issued upon the surrender for exchange of Certificates, and such
fractional share interests will not entitle the owner thereof to vote or to any
rights of a stockholder of Parent. In lieu of the issuance of any fractional
shares of Parent Common Stock pursuant to Section 3.1(d), a cash adjustment will
be paid to any holder of Company Common Stock in respect of any such fractional
shares that would otherwise be issuable to such holder in an amount equal to (i)
the product of (x) the fraction of a share of Parent Common Stock to which such
holder would otherwise be entitled to receive pursuant to Section 3.1(d) (after
taking into account all shares of Company Common Stock then held of record by
such holder) and (y) the Per Share Amount, divided by (ii) .625.
 
     (f) Neither Parent nor the Company will be liable to any holder of shares
of Company Common Stock, Company Preferred Stock, Parent Common Stock (or
attached Parent Rights) or Parent New Preferred Stock for any such shares (or
dividends or distributions with respect thereto) or cash delivered to a public
official pursuant to any applicable abandoned property, escheat or similar law.
 
     (g) Any portion of the Exchange Fund that remains undistributed to the
holders of shares of Company Common Stock and Company Preferred Stock for one
year after the Effective Time will be delivered to Parent, upon demand, and any
holders of shares of Company Common Stock and Company Preferred Stock who have
not theretofore complied with this Article III will thereafter look only to
Parent for the Merger Consideration and any unpaid dividends and distributions
payable pursuant to Section 3.2(c) to which they are entitled pursuant to this
Article III.
 
     (h) Parent or the Exchange Agent will be entitled to deduct and withhold
from the consideration otherwise payable pursuant to this Agreement to any
holder of shares of Company Common Stock or Company Preferred Stock such amounts
as Parent or the Exchange Agent is required to deduct and withhold
 
                                        6
<PAGE>   14
 
with respect to the making of such payment under the Internal Revenue Code of
1986, as amended (the "Code"), or any provision of state, local or foreign tax
law. To the extent that amounts are so withheld by Parent or the Exchange Agent,
such withheld amounts will be treated for all purposes of this Agreement as
having been paid to the holder of the shares of Company Common Stock or Company
Preferred Stock in respect of which such deduction and withholding was made by
Parent or the Exchange Agent.
 
     Section 3.3 Dissenting Shares.  If required by the DGCL but only to the
extent required thereby, shares of Company Common Stock and Company Preferred
Stock which are issued and outstanding immediately prior to the Effective Time
and which are held by holders of such shares of Company Common Stock and Company
Preferred Stock, as the case may be, who have properly exercised appraisal
rights with respect thereto in accordance with Section 262 of the DGCL (the
"Dissenting Shares") will not be converted into or be exchangeable for the right
to receive the relevant Merger Consideration, and holders of such shares of
Company Common Stock and Company Preferred Stock will be entitled to receive
payment of the appraised value of such shares of Company Common Stock and
Company Preferred Stock, as the case may be, in accordance with the provisions
of such Section 262 unless and until such holders fail to perfect or effectively
withdraw or lose their rights to appraisal and payment under the DGCL. If, after
the Effective Time, any such holder fails to perfect or effectively withdraws or
loses such right, such shares of Company Common or Company Preferred Stock will
thereupon be treated as if they had been converted into and to have become
exchangeable for, at the Effective Time, the right to receive the Merger
Consideration and any unpaid dividends and distributions payable pursuant to
Section 3.2(c) to which the holder of such shares of Company Common Stock or
Company Preferred Stock is entitled, without any interest thereon. The Company
will give Parent prompt notice of any demands received by the Company for
appraisal of shares of Company Common Stock or Company Preferred Stock and,
prior to the Effective Time, Parent will have the right to participate in all
negotiations and proceedings with respect to such demands. Prior to the
Effective Time, the Company will not, except with the prior written consent of
Parent, make any payment with respect to, or settle or offer to settle, any such
demands.
 
                                   ARTICLE IV
 
                 REPRESENTATIONS AND WARRANTIES OF THE COMPANY
 
     The Company represents and warrants to Parent and Sub as follows:
 
     Section 4.1 Organization.
 
     (a) Each of the Company and each Material Company Subsidiary (as defined
below) is a corporation or other legal entity duly organized, validly existing
and in good standing under the laws of the jurisdiction of its incorporation or
organization and has all requisite corporate power and authority to own, lease
and operate its properties and to carry on its business as now being conducted,
except where the failure to be so organized, existing or in good standing or to
have such power and authority would not, individually or in the aggregate, have
a material adverse effect on the Company and its Subsidiaries. As used in this
Agreement, any reference to any event, change or effect being material or having
a material adverse effect on or with respect to an entity (or such entity and
its subsidiaries) means such event, change or effect which is materially adverse
to the business, assets, results of operations or financial condition of such
entity (or, if with respect to such entity and its subsidiaries, such group of
entities taken as a whole). The Company and each Material Company Subsidiary is
duly qualified or licensed to do business and in good standing in each
jurisdiction in which the property owned, leased or operated by it or the nature
of the business conducted by it makes such qualification or licensing necessary,
except where the failure to be so duly qualified or licensed and in good
standing would not, individually or in the aggregate, have a material adverse
effect on the Company and its Subsidiaries.
 
     (b) Each of Transcontinental Gas Pipe Line Corporation ("TGPL"), Texas Gas
Transmission Corporation, Transco Gas Marketing Company, Transco Coal Company
and Transco Gas Company is referred to herein as a "Material Company
Subsidiary."
 
     (c) The Company has heretofore made available to Parent a complete and
correct copy of the charter and by-laws or comparable organizational documents,
each as amended to date, of the Company and each
 
                                        7
<PAGE>   15
 
Material Company Subsidiary. Such charters, by-laws and comparable
organizational documents are in full force and effect. Neither the Company nor
any Material Company Subsidiary is in violation of any provision of its charter,
by-laws or comparable organizational documents, except for such violations that
would not, individually or in the aggregate, have a material adverse effect on
the Company and its Subsidiaries.
 
     Section 4.2 Capitalization.  As of the date of this Agreement, the
authorized capital stock of the Company consists of (i) 150,000,000 shares of
Company Common Stock of which, as of December 9, 1994, 40,927,847 shares
(including 216,900 shares of restricted stock) were issued and outstanding and
514,444 shares were held in treasury, (ii) 15,000,000 shares of Cumulative
Preferred Stock, without par value ("Company Cumulative Preferred Stock"), of
which, as of December 9, 1994, 2,979,900 shares of the Company's $4.75 series
Cumulative Convertible Preferred Stock, stated rate $50 per share (the "Company
$4.75 Preferred Stock") were issued and outstanding, 2,500,000 shares of Company
Preferred Stock were issued and outstanding, 4,848,484 shares of the Company's
Cumulative Convertible Preferred Stock, 9.25% Series were authorized but none
outstanding all such shares ever outstanding having been repurchased by the
Company, and none of which shares were held in treasury, and (iii) 2,000,000
shares of Cumulative Second Preferred Stock, without par value, of which no
shares are issued and outstanding. As of December 9, 1994, 56,850,563 shares of
Company Common Stock were reserved for issuance in accordance with the Rights
Agreement, dated as of January 13, 1986, by and between the Company and First
Chicago Trust Company, as amended most recently as of January 24, 1991
(collectively, the "Company Rights Agreement"), pursuant to which the Company
has issued rights (the "Company Rights") to purchase shares of Company Common
Stock. Also as of December 9, 1994, the Company had reserved for issuance (i)
2,664,031 shares of Company Common Stock for conversion of Company $4.75
Preferred Stock at a conversion ratio of .894 of a share of Company Common Stock
for each share of Company $4.75 Preferred Stock, (ii) 6,295,000 shares of
Company Common Stock for conversion of Company Preferred Stock at a conversion
ratio of 2.5 shares of Company Common Stock for each share of Company Preferred
Stock, (iii) 3,322,078 shares of Company Common Stock upon exercise of then
outstanding options or in respect of outstanding restricted stock or restricted
or deferred stock units under the Company's stock option plans (the "Company
Plans"), (iv) 1,077,906 shares of Company Common Stock in respect of future
grants of options, restricted stock or restricted or deferred stock units which
may be made pursuant to the Company Plans, and (v) as of December 11, 1994,
7,500,000 shares of Company Common Stock issuable upon exercise by Parent of the
Stock Option Agreement. Since December 9, 1994, the Company has not issued any
shares of its capital stock, except for issuances of Company Common Stock upon
the exercise of options or vesting of restricted stock or deferred stock unit
awards granted under the Company Plans which were outstanding on December 9,
1994 and upon conversion of shares of Company Preferred Stock, and has not
repurchased, redeemed or otherwise retired any shares of its capital stock other
than (i) pursuant to Section 14.07 of the Lease Agreement, dated September 1,
1993, between Corpus Christi Transmission Company, a general partnership, and
Corpus Christi Industrial Pipeline Company, a general partnership, as lessor,
and Corpus Christi Natural Gas Company, as lessee (the "Corpus Christi Lease"),
or (ii) in connection with tax withholding features under the Company Plans. All
the outstanding shares of the Company's capital stock are, and all shares which
may be issued pursuant to the Company Plans, upon conversion of Company
Preferred Stock or upon exercise of the Stock Option Agreement will be, when
issued and paid for in accordance with the respective terms thereof, duly
authorized, validly issued, fully paid and nonassessable and not subject to any
preemptive rights of third parties in respect thereto. As of the date of this
Agreement, no bonds, debentures, notes or other indebtedness having the right to
vote under ordinary circumstances (or convertible into securities having such
right to vote) ("Voting Debt") of the Company or any of its Subsidiaries are
issued or outstanding. Except as set forth above and on Section 4.2 of the
Disclosure Schedule delivered by the Company to Parent pursuant to this
Agreement (the "Company Disclosure Schedule"), as of the date of this Agreement,
there are no existing options, warrants, calls, subscriptions or other rights or
other agreements or commitments of any character relating to the issued or
unissued capital stock or Voting Debt of the Company or any of its Subsidiaries
or obligating the Company or any of its Subsidiaries to issue, transfer or sell
or cause to be issued, transferred or sold any shares of capital stock or Voting
Debt of, or other equity interests in, the Company or of any of its Subsidiaries
or securities convertible into or exchangeable for such shares or equity
interests or obligating the Company or any of its Subsidiaries to grant, extend
or enter into any such option, warrant, call, subscription or
 
                                        8
<PAGE>   16
 
such other right, agreement or commitment. As of the date of this Agreement,
there are no outstanding contractual obligations of the Company or any of its
Subsidiaries to repurchase, redeem or otherwise acquire any shares of capital
stock of the Company or any of its Subsidiaries, other than (i) pursuant to the
Stock Option Agreement, (ii) pursuant to the Corpus Christi Lease, (iii) in
connection with tax withholding features under the Company Plans, (iv)
forfeitures of restricted stock in accordance with its terms, and (v) in
connection with the "change of control" put provisions of the Company Preferred
Stock and the preferred stock of TGPL (the "Subsidiary Preferred Stock"). Each
of the outstanding shares of capital stock of each of the Company's Subsidiaries
is duly authorized, validly issued, fully paid, nonassessable and free of any
preemptive rights in respect thereto, and, except as set forth on Section 4.2 of
the Company Disclosure Schedule, such shares are owned by the Company or by a
Subsidiary of the Company free and clear of any lien, claim, option, charge,
security interest, limitation on voting rights and encumbrance of any kind,
except as would not have a material adverse effect on the Company and its
Subsidiaries.
 
     Section 4.3 Authority.  The Company has the requisite corporate power and
authority to execute and deliver this Agreement and the Stock Option Agreement
and to consummate the transactions contemplated hereby and thereby, subject to,
with respect to the Merger, the approval and adoption of this Agreement and the
Merger by the affirmative vote of the holders of Company Common Stock entitled
to cast at least a majority of the total number of votes entitled to be cast by
holders of Company Common Stock. The execution, delivery and performance of this
Agreement and the Stock Option Agreement by the Company and the consummation by
the Company of the Merger and of the other transactions contemplated hereby and
thereby have been duly authorized by all necessary corporate action on the part
of the Company and no other corporate proceedings on the part of the Company are
necessary to authorize this Agreement or the Stock Option Agreement or to
consummate the transactions so contemplated, other than, with respect to the
Merger, the approval and adoption of this Agreement and the Merger by the
affirmative vote of the holders of Company Common Stock entitled to cast at
least a majority of the total number of votes entitled to be cast by holders of
Company Common Stock, and the filing and recordation of the Certificate of
Merger with the Secretary of State of the State of Delaware. Each of this
Agreement and the Stock Option Agreement has been duly executed and delivered by
the Company and, assuming this Agreement and the Stock Option Agreement, as the
case may be, constitutes a valid and binding obligation of Parent and Sub, as
the case may be, constitutes a valid and binding obligation of the Company,
enforceable against the Company in accordance with its terms.
 
     Section 4.4 Consents and Approvals; No Violations.
 
     (a) Except as set forth on Section 4.4 of the Company Disclosure Schedule
and except for filings, permits, authorizations, notices, consents and approvals
as may be required under, and other applicable requirements of, the Exchange
Act, the Securities Act of 1933, as amended (the "Securities Act"), the Trust
Indenture Act of 1939, as amended (the "TIA"), the Hart-Scott-Rodino Antitrust
Improvements Act of 1976, as amended (the "HSR Act"), the DGCL, certain state
takeover statutes, state securities or blue sky laws, and state environmental
laws, neither the execution, delivery or performance of this Agreement or the
Stock Option Agreement by the Company nor the consummation by the Company of the
transactions contemplated hereby or thereby and compliance by the Company with
any of the provisions hereof or thereof will (i) conflict with or result in any
breach of any provisions of the certificate of incorporation or by-laws or
comparable organizational documents of the Company or any Material Company
Subsidiary, (ii) require any filing with, or permit, authorization, consent or
approval of, any court, arbitral tribunal, administrative agency or commission
or other governmental or other regulatory authority or agency (a "Governmental
Entity") (except where the failure to obtain such permits, authorizations,
consents or approvals or to make such filings would not prevent consummation of
the Offer or the Merger in any material respect and would not, individually or
in the aggregate, have a material adverse effect on the Company and its
Subsidiaries, (iii) result in a violation or breach of, or constitute (with or
without due notice or lapse of time or both) a default (or give rise to any
right of termination, amendment, cancellation or acceleration) under, or result
in the creation of any lien or other encumbrance on any property or asset of the
Company or any of its Subsidiaries pursuant to, any of the terms, conditions or
provisions of any note, bond, mortgage, indenture, lease, license, contract,
agreement or other instrument or obligation to which the Company or any of its
 
                                        9
<PAGE>   17
 
Subsidiaries is a party or by which any of them or any of their properties or
assets may be bound or (iv) violate any order, writ, injunction, decree,
statute, rule or regulation applicable to the Company or any of its Subsidiaries
or by which any property or asset of the Company or any of its Subsidiaries is
bound or affected, except, in the case of clauses (iii) and (iv), for
violations, breaches, defaults or other occurrences which would not prevent
consummation of the Offer or the Merger in any material respect and would not,
individually or in the aggregate, have a material adverse effect on the Company
and its Subsidiaries.
 
     (b) Except as disclosed in the Company SEC Documents (as defined in Section
4.5) filed prior to the date of this Agreement or as set forth on Section 4.4 of
the Company Disclosure Schedule, to the best knowledge of the Company, neither
the Company nor any of its Subsidiaries is in default under or in violation of
(i) any order, writ, injunction, decree, statute, rule or regulation of any
Governmental Entity applicable to the Company or any of its Subsidiaries or by
which any of them or any of their properties or assets may be bound or (ii) any
note, bond, mortgage, indenture, lease, license, contract, agreement or other
instrument or obligation to which the Company or any of its Subsidiaries is a
party or by which any of them or any of their properties or assets may be bound
or affected, except in each case for any such defaults or violations which would
not have a material adverse effect on the Company and its Subsidiaries.
 
     (c) To the best knowledge of the Company, except as disclosed in the
Company SEC Documents filed prior to the date of this Agreement or as set forth
on Section 4.4 of the Company Disclosure Schedule, the Company and its
Subsidiaries are in compliance with all applicable statutes, ordinances, rules
and regulations of any Governmental Entity relating to environmental matters,
and the Company is not aware of circumstances, which establish a likely basis
for a contingent liability, or a likely basis for the assertion of any such
liability, relating to any environmental matters against the Company or any of
its Subsidiaries, including the discharge, disposal, treatment, storage,
accumulation, transport, release, potential release, leakage, spillage or other
actions by the Company or any of its Subsidiaries or any third party for whom
the Company or any of its Subsidiaries is responsible with respect to hazardous
waste, toxic substances, hazardous substances or other pollutants or
contaminants, except for any such failures to comply or circumstances which have
not had and since December 31, 1993 would not have a material adverse effect on
the Company and its Subsidiaries.
 
     Section 4.5 SEC Reports and Financial Statements.  Since January 1, 1991,
the Company has filed with the SEC all forms, reports and documents required to
be filed by it under the Exchange Act or the Securities Act, and has heretofore
made available to Parent true and complete copies of all such forms, reports and
documents (as they have been amended since the time of their filing,
collectively, the "Company SEC Documents"). The Company SEC Documents, including
without limitation any financial statements or schedules included therein, at
the time filed, and any forms, reports or other documents filed by the Company
with the SEC after the date of this Agreement, (a) did not at the time they were
filed, or will not at the time they are filed, contain any untrue statement of a
material fact or omit to state a material fact required to be stated therein or
necessary in order to make the statements therein, in light of the circumstances
under which they were made, not misleading and (b) complied or will be prepared
in compliance in all material respects with the applicable requirements of the
Exchange Act or the Securities Act, as the case may be. The financial statements
of the Company included in the Company SEC Documents comply as to form in all
material respects with applicable accounting requirements and with the published
rules and regulations of the SEC with respect thereto, have been prepared in
accordance with United States generally accepted accounting principles applied
on a consistent basis during the periods involved (except as may be indicated in
the notes thereto or, in the case of the unaudited statements, to normal audit
adjustments) and fairly present (subject, in the case of the unaudited
statements, to normal audit adjustments) the consolidated financial position of
the Company and its consolidated Subsidiaries as at the dates thereof and the
consolidated results of their operations and cash flows for the periods then
ended. Except as reflected, reserved against or otherwise disclosed in the
financial statements of the Company included in the Company SEC Documents or as
otherwise disclosed in the Company SEC Documents, in each case filed prior to
the date of this Agreement, or as set forth on Section 4.5 of the Company
Disclosure Schedule, to the best knowledge of the Company, as of the date
hereof, neither the Company nor any of its Subsidiaries had any liabilities or
obligations (absolute, accrued, fixed, contingent or otherwise) material to the
Company and its Subsidiaries, other than liabilities incurred in the ordinary
course of business consistent with past practice.
 
                                       10
<PAGE>   18
 
     Section 4.6 Information in Disclosure Documents and Registration Statement.
 
     (a) Neither the Schedule 14D-9 nor any of the information supplied by the
Company and any of its Subsidiaries specifically for inclusion in the Offer
Documents will, at the respective times the Schedule 14D-9 or the Offer
Documents are filed with the SEC or are first published, sent or given to
stockholders, as the case may be, contain any untrue statement of a material
fact or omit to state any material fact required to be stated therein or
necessary in order to make the statements therein, in light of the circumstances
under which there was made, not misleading. The Schedule 14D-9 will comply as to
form in all material respects with the applicable requirements of the Exchange
Act and the applicable rules and regulations thereunder.
 
     (b) None of the information supplied or to be supplied by the Company from
time to time in writing specifically for inclusion or incorporation by reference
in the registration statement on Form S-4 to be filed with the SEC by Parent in
connection with the issuance of shares of Parent Common Stock (and attached
Parent Rights) and, if required, Parent New Preferred Stock in the Merger or to
holders of Company Stock Options (as defined in Section 6.10(b)) (the "S-4")
will, at the time it becomes effective under the Securities Act and at the
Effective Time, contain any untrue statement of a material fact or omit to state
any material fact required to be stated therein or necessary to make the
statements therein, in light of the circumstances under which they were made,
not misleading.
 
     (c) The proxy or information statement relating to the meeting of the
Company's stockholders to be held in connection with the Merger (as it may be
amended from time to time, the "Proxy Statement") will not, at the date mailed
to the Company's stockholders and at the time of the meeting of stockholders to
be held in connection with the Merger, contain any untrue statement of a
material fact or omit to state any material fact required to be stated therein
or necessary in order to make the statements therein, in light of the
circumstances under which they are made, not misleading. The Proxy Statement
will, when filed with the SEC by the Company, comply as to form in all material
respects with the provisions of the Exchange Act and the rules and regulations
thereunder.
 
     (d) Notwithstanding the foregoing, the Company makes no representation with
respect to statements made in any of the foregoing documents based on
information supplied by Parent or Sub specifically for inclusion therein.
 
     Section 4.7 Litigation.  Except as disclosed in the Company SEC Documents
filed prior to the date of this Agreement or in Section 4.7 of the Company
Disclosure Schedule, there is as of the date hereof no suit, claim, action,
proceeding or investigation pending or, to the best knowledge of the Company,
threatened, against the Company or any of its Subsidiaries before any
Governmental Entity which, individually or in the aggregate, would have a
material adverse effect on the Company and its Subsidiaries or a material
adverse effect on the ability of the Company to consummate the transactions
contemplated by this Agreement or by the Stock Option Agreement. Except as
disclosed in the Company SEC Documents filed prior to the date of this
Agreement, neither the Company nor any of its Subsidiaries is subject to any
outstanding order, writ, injunction or decree which, individually or in the
aggregate, would have a material adverse effect on the Company and its
Subsidiaries or a material adverse effect on the ability of the Company to
consummate the transactions contemplated hereby or by the Stock Option
Agreement.
 
     Section 4.8 No Material Adverse Change; Material Agreements.  Except as
disclosed in the Company SEC Documents filed prior to the date of this Agreement
or as set forth on Section 4.8 of the Company Disclosure Schedule, (i) since
December 31, 1993, there has not been any action which would be prohibited under
Section 6.1 were it to occur after the date of this Agreement or any material
adverse change in the assets, business, results of operations or financial
condition of the Company and its Subsidiaries, other than changes arising from
general economic or industry conditions, and (ii) as of the date of this
Agreement, neither the Company nor any of its Subsidiaries has become a party to
any agreement or amendment to an existing agreement which would be required to
be filed by the Company as an exhibit to its next Annual Report on Form 10-K.
Except as set forth on Section 4.8 of the Company Disclosure Schedule, the
transactions contemplated by this Agreement or the Stock Option Agreement or
both will not constitute a "change of control" under, require the consent from
or the giving of notice to a third party pursuant to, or accelerate vesting or
repurchase rights under the terms, conditions or provisions of any (i) note,
bond,
 
                                       11
<PAGE>   19
 
mortgage, indenture, license, lease, contract, agreement or other instrument or
obligation to which the Company or any of its Subsidiaries is a party or by
which any of them or any of their properties or assets may be bound, except
where the adverse consequences resulting from such change of control or where
the failure to obtain such consents or provide such notices would not,
individually or in the aggregate, have a material adverse effect on the Company
and its Subsidiaries; provided, however, that the foregoing exception will not
be applicable to any (i) note, bond, mortgage, indenture, contract, agreement or
other instrument or obligation relating to indebtedness for borrowed money of
the Company or any of its Subsidiaries with an outstanding principal amount of
less than $5,000,000 or (ii) employment, compensation, termination or severance
agreement, or other instrument or obligation of the Company or any of its
Subsidiaries. The total amounts payable to the executives identified on Section
4.8 of the Company Disclosure Schedule, as a result of the transactions
contemplated by this Agreement and/or any subsequent employment termination
(excluding any cash-out or acceleration of options and restricted stock but
including any "gross-up" payments with respect thereto), based on compensation
data applicable as of the date hereof, calculated assuming effective tax rates
of 39.6%, and including, without limitation, amounts payable pursuant to
Termination Agreements, Severance Agreements and the Senior Executive Special
Bonus and Retention Plan and any "gross-up" payments, will not exceed the amount
set forth on such schedule.
 
     Section 4.9 Taxes.
 
     (a) The Company and each of its Subsidiaries has duly filed all federal,
state, local and foreign income Tax Returns (as defined in Section 4.9(b))
required to be filed by it, and all other material Tax Returns required to be
filed by it, and all other material Tax Returns required to be filed by it
except in the case of such other Tax Returns where the failure to so file will
not have a material adverse effect on the Company and its Subsidiaries, and
except as set forth in Section 4.9 of the Company Disclosure Schedule the
Company, in all material respects, has duly paid or caused to be paid all Taxes
(as defined in Section 4.9(b)) shown to be due on such Tax Returns in respect of
the periods covered by such returns and has made adequate provision in the
Company's financial statements for payment of all Taxes anticipated to be
payable in respect of all taxable periods or portions thereof ending on or
before the date hereof. Section 4.9 of the Company Disclosure Schedule lists the
periods through which the Tax Returns required to be filed by the Company have
been examined by the Internal Revenue Service (the "IRS") or other appropriate
taxing authority, or the period during which any assessments may be made by the
IRS or other appropriate taxing authority has expired. Except as set forth on
Section 4.9 of the Company Disclosure Schedule, all material deficiencies and
assessments asserted as a result of such examinations or other audits by
federal, state, local or foreign taxing authorities have been paid, fully
settled or adequately provided for in the Company's financial statements, and no
issue or claim has been asserted in writing for Taxes by any taxing authority
for any prior period, the adverse determination of which would result in a
deficiency which would have a material adverse effect on the Company and its
Subsidiaries, other than those heretofore paid or provided for in the Company's
Financial statements. Except as set forth on Section 4.9 of the Company
Disclosure Schedule, there are no outstanding agreements or waivers extending
the statutory period of limitation applicable to any Tax Return of the Company
or its Subsidiaries. Neither the Company nor any of its Subsidiaries has filed a
consent pursuant to Section 341(f) of the Code or agreed to have Section
341(f)(2) of the Code apply to any disposition of a subsection (f) asset (as
such term is defined in Section 341(f)(2) of the Code) owned by the Company or
any of its Subsidiaries. Except as set forth on Section 4.9 of the Company
Disclosure Schedule, neither the Company nor any of its Subsidiaries is a party
to any agreement, contract or arrangement that could result, separately or in
the aggregate, in the payment of any "excess parachute payments" within the
meaning of Section 280G of the Code. Except as set forth on Section 4.9 of the
Company Disclosure Schedule, neither the Company nor any of its Subsidiaries (i)
has been a member of a group filing consolidated returns for federal income tax
purposes, or (ii) is a party to a tax sharing or tax indemnity agreement or any
other agreement of a similar nature that remains in effect.
 
     (b) For purposes of this Agreement, the term "Taxes" means all taxes,
charges, fees, levies or other assessments, including, without limitation,
income, gross receipts, excise, property, sales, transfer, license, payroll,
withholding, capital stock and franchise taxes, imposed by the United States or
any state, local or foreign government or subdivision or agency thereof,
including any interest, penalties or additions thereto. For
 
                                       12
<PAGE>   20
 
purposes of this Agreement, the term "Tax Return" means any report, return or
other information or document required to be supplied to a taxing authority in
connection with Taxes.
 
     Section 4.10 Opinion of Financial Advisor.  The Company has received the
opinion of Merrill Lynch & Co., its financial advisor, to the effect that, as of
December 11, 1994, the consideration to be received in the Offer and the Merger,
taken as a whole, by the Company's stockholders is fair to the Company's
stockholders from a financial point of view.
 
     Section 4.11 Company Rights Agreement.  Assuming the accuracy of the
representation contained in Section 5.10 (without giving effect to the knowledge
qualification thereof), none of the transactions contemplated in this Agreement
or the Stock Option Agreement or both will result in a "Distribution Date" as
defined in the Company Rights Agreement, other than an exercise of the Stock
Option Agreement following which Parent beneficially owns 20% or more of the
outstanding shares of Company Common Stock.
 
     Section 4.12 DGCL Section 203.  Assuming the accuracy of Parent's
representation contained in Section 5.10 (without giving effect to the knowledge
qualification thereof), the Board of Directors of the Company has approved the
transaction to be effected in accordance with this Agreement and the Stock
Option Agreement, which will result in Parent becoming an "interested
stockholder" within the meaning of paragraph (a)(1) of Section 203 of the DGCL.
 
     Section 4.13 Change in Control Provisions.  Other than as set forth on
Section 4.13 of the Company Disclosure Schedule, the Board of Directors of the
Company has taken all actions necessary to render inoperative to the Offer, the
Merger and the other transactions contemplated by this Agreement and the Stock
Option Agreement the redemption rights afforded to the holders of the Company
Preferred Stock and the Subsidiary Preferred Stock or to the holders of or
trustees under indentures relating to indebtedness of the Company or any of its
subsidiaries in the event of a "change in control" as defined in the respective
Certificates of Designations, Preferences and Rights governing the Company
Preferred Stock and the Subsidiary Preferred Stock or in the related indentures
or other debt agreements, as the case may be.
 
     Section 4.14 Vote Required.  The affirmative vote of the holders of a
majority of the outstanding shares of Company Common Stock entitled to vote with
respect to the Merger is the only vote of the holders of any class or series of
the Company's capital stock necessary to approve the Merger and the transactions
contemplated hereby or by the Stock Option Agreement. Assuming the accuracy of
Parent's representations contained in Section 5.10 (without giving effect to the
knowledge qualification thereof), the Board of Directors of the Company has
taken all action necessary to render inoperative to the Offer, the Merger and
the other transactions contemplated by this Agreement and by the Stock Option
Agreement the voting requirements of Article EIGHTH of the Company's Restated
Certificate of Incorporation.
 
                                   ARTICLE V
 
                REPRESENTATIONS AND WARRANTIES OF PARENT AND SUB
 
     Parent and Sub represent and warrant to the Company as follows:
 
     Section 5.1 Organization.
 
     (a) Each of Parent and each Material Parent Subsidiary (as defined below)
is a corporation duly organized, validly existing and in good standing under the
laws of the jurisdiction of its incorporation and has all requisite corporate
power and authority to own, lease and operate its properties and to carry on its
business as now being conducted, except where the failure to be so organized,
existing or in good standing or to have such power and authority would not,
individually or in the aggregate, have a material adverse effect on Parent and
its Subsidiaries taken as a whole. Parent and each Material Parent Subsidiary is
duly qualified or licensed to do business and in good standing in each
jurisdiction in which the property owned, leased or operated by it or the nature
of the business conducted by it makes such qualification or licensing necessary,
except where the failure to be so duly qualified or licensed and in good
standing would not, individually or in the aggregate, have a material adverse
effect on Parent and its Subsidiaries.
 
                                       13
<PAGE>   21
 
     (b) Each of Northwest Pipeline Corporation, Williams Natural Gas Company,
Williams Field Services Group, Inc., Williams Pipe Line Company and WilTel
Communications Systems, Inc. is referred to herein as a "Material Parent
Subsidiary."
 
     (c) Parent has heretofore made available to the Company a complete and
correct copy of the charter and by-laws or comparable organizational documents,
each as amended to date, of Parent and each Material Parent Subsidiary. Such
charters, by-laws and comparable organizational documents are in full force and
effect. Neither Parent nor any Material Parent Subsidiary is in violation of any
provision of its charter, by-laws or comparable organizational documents, except
for such violations that would not, individually or in the aggregate, have a
material adverse effect on Parent and its Subsidiaries.
 
     Section 5.2 Capitalization.  As of the date of this Agreement, the
authorized capital stock of Parent consists of (i) 240,000,000 shares of Parent
Common Stock of which, as of September 30, 1994, 100,904,625 shares were issued
and outstanding (excluding 3,442,189 shares then held by WTG Holdings, Inc., a
wholly-owned subsidiary of Parent), and (ii) 30,000,000 shares of preferred
stock, $1.00 per share (the "Parent Preferred Stock", which term, as the context
requires, includes the Parent New Preferred stock), of Parent of which, as of
September 30, 1994, 4,000,000 shares of Parent's $2.21 Cumulative Preferred
Stock were issued and outstanding. As of September 30, 1994, 400,000 shares of
Parent Preferred Stock were reserved for issuance in accordance with the Amended
and Restated Rights Agreement, dated as of July 12, 1988, by and between Parent
and First Chicago Trust Company of New York (collectively, the "Parent Rights
Agreement"), pursuant to which Parent has issued rights (the "Parent Rights") to
purchase shares of Parent Preferred Stock, with each share of Parent Common
Stock having one-half attached Parent Right. Also as of September 30, 1994,
Parent had reserved for issuance (i) 2,838,491 shares of Parent Common Stock
upon exercise of then outstanding options or in respect of then outstanding
deferred stock awards under Parent's employee benefit plans (the "Parent
Plans"), (ii) 3,208,171 shares of Parent Common Stock in respect of future
purchases or awards under the Parent Plans, and (iii) shares of Parent capital
stock (which could include shares of Parent Common Stock, Parent Preferred Stock
or both) with an initial offering price not to exceed $400,000,000. Since
September 30, 1994, Parent has not issued any shares of its capital stock,
except for issuances of Parent Common Stock under the Parent Plans, and Parent
and its Subsidiaries have not repurchased, redeemed or otherwise retired any
shares of its capital stock, other than 406,112 shares of Parent Common Stock
and 258,800 shares of Parent Preferred Stock acquired by Parent and 9,941,788
shares of Parent Common Stock acquired by WTG Holdings, Inc. (in each case as of
November 30, 1994) in the open market. No shares of Parent Common Stock or
Parent Preferred Stock have been acquired by Parent or its subsidiaries during
the period commencing December 1, 1994 through the date hereof. All the
outstanding shares of Parent's capital stock are, and all shares of Parent
Common Stock and Parent New Preferred Stock which are to be issued pursuant to
the Merger will be, when issued in exchange for shares of Company Common Stock
and Company Preferred Stock in accordance with the respective terms thereof and
the provisions of this Agreement, duly authorized, validly issued, fully paid
and nonassessable and not subject to any preemptive rights of third parties in
respect thereto. Parent has reserved and will keep available for issuance a
number of authorized but unissued shares of Parent Common Stock and Parent New
Preferred Stock equal to the maximum number of shares of Parent Common Stock and
Parent New Preferred Stock that may become issuable pursuant to the Merger and,
following the Merger, upon conversion of the shares of Parent New Preferred
Stock into Parent Common Stock, in each case in accordance with conversion rates
as in effect as of the date hereof. As of the date of this Agreement, no Voting
Debt of Parent or any of its Subsidiaries is issued or outstanding. As of the
date of this Agreement, except as indicated herein, there are no existing
options, warrants, calls, subscriptions or other rights or other agreements or
commitments of any character relating to the issued or unissued capital stock or
Voting Debt of Parent or any of its Subsidiaries or obligating Parent or any of
its Subsidiaries to issue, transfer or sell or cause to be issued, transferred
or sold any shares of capital stock or Voting Debt of, or other equity interests
in, Parent or of any of its Subsidiaries or securities convertible into or
exchangeable for such shares or equity interests or obligating Parent or any of
its Subsidiaries to grant, extend or enter into any such option, warrant, call,
subscription or other right, agreement or commitment. As of the date of this
Agreement, there are no outstanding contractual obligations of Parent or any of
its Subsidiaries to repurchase, redeem or otherwise acquire any shares of
capital stock of Parent or any of its Subsidiaries. Each of the outstanding
shares of capital stock of each of the Parent's Subsidiaries is
 
                                       14
<PAGE>   22
 
duly authorized, validly issued, fully paid and nonassessable, and such shares
as are owned by Parent or by a Subsidiary of Parent are free and clear of any
lien, claim, option, charge, security interest, limitation on voting rights and
encumbrance of any kind, except as would not have a material adverse effect on
Parent and its Subsidiaries. As of the date of this Agreement, the authorized
capital stock of Sub consists of 100 shares of Common Stock, par value $.01 per
share, all of which are validly issued, fully paid and nonassessable and are
owned by Parent.
 
     Section 5.3 Authority.  Parent and Sub each have the requisite corporate
power and authority to execute and deliver this Agreement and the Stock Option
Agreement and to consummate the transactions contemplated hereby and thereby.
The execution, delivery and performance of this Agreement and the Stock Option
Agreement by each of Parent and Sub and the consummation by Sub of the Merger
and by Parent and Sub of the other transactions contemplated hereby and thereby
have been duly authorized by all necessary corporate action on the part of
Parent and Sub and no other corporate proceedings on the part of Parent or Sub
(including stockholder action) are necessary to authorize this Agreement or the
Stock Option Agreement or to consummate the transactions so contemplated, other
than the filing and recordation of the Certificate of Merger and Certificates of
Designation, Preferences and Rights with respect to the Parent New Preferred
Stock with the Secretary of State of the State of Delaware. Each of this
Agreement and the Stock Option Agreement has been duly executed and delivered by
each of Parent and Sub and, assuming each of this Agreement and the Stock Option
Agreement, as the case may be, constitutes a valid and binding obligation of the
Company, constitutes a valid and binding obligation of each of Parent and Sub,
enforceable against them in accordance with its terms.
 
     Section 5.4 Consents and Approvals; No Violations.
 
     (a) Except for filings, permits, authorizations, notices, consents and
approvals as may be required under, and other applicable requirements of, the
Exchange Act, the Securities Act, the TIA, the HSR Act, the DGCL, certain state
takeover statutes, state securities or blue sky laws, and state environmental
laws, neither the execution, delivery or performance of this Agreement by Parent
and Sub nor the consummation by Parent and Sub of the transactions contemplated
hereby nor compliance by Parent and Sub with any of the provisions hereof will
(i) conflict with or result in any breach of any provision of the respective
certificates of incorporation or by-laws or comparable organizational documents
of Parent or any Material Parent Subsidiary, (ii) require any filing with, or
permit, authorization, consent or approval of, any Governmental Entity (except
where the failure to obtain such permits, authorizations, consents or approvals
or to make such filings would not prevent consummation of the Merger in any
material respect and would not, individually or in the aggregate, have a
material adverse effect on Parent and its Subsidiaries), (iii) result in a
violation or breach of, or constitute (with or without due notice or lapse of
time or both) a default (or give rise to any right of termination, amendment,
cancellation or acceleration) under, or result in the creation of any lien or
other encumbrance on any property or asset of Parent or any of its Subsidiaries
pursuant to, any of the terms, conditions or provisions of any note, bond,
mortgage, indenture, license, lease, contract, agreement or other instrument or
obligation to which Parent or any of its Subsidiaries is a party or by which any
of them or any of their properties or assets may be bound or (iv) violate any
order, writ, injunction, decree, statute, rule or regulation applicable to
Parent or any of its Subsidiaries or by which any property or asset of Parent or
any of its Subsidiaries is bound or affected, except, in the case of clauses
(iii) and (iv), for violations, breaches, defaults or other occurrences which
would not prevent consummation of the Merger in any material respect and would
not, individually or in the aggregate, have a material adverse effect on Parent
and its Subsidiaries.
 
     (b) Except as disclosed in the Parent SEC Documents (as defined in Section
5.5) filed prior to the date of this Agreement, to the best knowledge of Parent,
neither Parent nor any Material Parent Subsidiary is in default under or in
violation of (i) any order, writ, injunction, decree, statute, rule or
regulation of any Governmental Entity applicable to Parent or any of its
Subsidiaries or by which any of them or any of their properties or assets may be
bound or (ii) any note, bond, mortgage, indenture, lease, license, contract,
agreement or other instrument or obligation to which Parent or any of its
Subsidiaries is a party or by which any of them or any of their properties or
assets may be bound or affected, except in each case for any such defaults or
violations which have not had and are not likely to have a material adverse
effect on Parent and its Subsidiaries.
 
                                       15
<PAGE>   23
 
     (c) To the best knowledge of Parent, except as disclosed in the Parent SEC
Documents filed prior to the date of this Agreement, Parent and its Subsidiaries
are in compliance with all applicable statutes, ordinances, rules and
regulations of any Governmental Entity relating to environmental matters, and
Parent is not aware of circumstances which establish a likely basis for a
contingent liability, or a likely basis for the assertion of any such liability,
relating to any environmental matters, against Parent or any of its Subsidiaries
including the discharge, disposal, treatment, storage, accumulation, transport,
release, potential release, leakage, spillage or other actions by Parent or any
of its Subsidiaries or any third party for whom Parent or any of its
Subsidiaries is responsible with respect to hazardous waste, toxic substances,
hazardous substances or other pollutants or contaminants, except for any such
failures to comply or circumstances which have not had since December 31, 1993
and would not have a material adverse effect on Parent and its Subsidiaries.
 
     Section 5.5 SEC Reports and Financial Statements.  Since January 1, 1991,
Parent has filed with the SEC all forms, reports and other documents required to
be filed by it under the Exchange Act or the Securities Act and has heretofore
made available to the Company true and complete copies of all such forms,
reports and documents (as they have been amended since the time of their filing,
collectively, the "Parent SEC Documents"). The Parent SEC Documents, including
without limitation any financial statements or schedules included therein, at
the time filed, and any forms, reports or other documents filed by Parent with
the SEC after the date of this Agreement, (a) did not at the time they were
filed, or will not at the time they are filed, contain any untrue statement of a
material fact or omit to state a material fact required to be stated therein or
necessary in order to make the statements therein, in light of the circumstances
under which they were made, not misleading and (b) complied or will be prepared
in compliance in all material respects with the applicable requirements of the
Exchange Act or the Securities Act, as the case may be. The financial statements
of Parent included in the SEC Documents comply as to form in all material
respects with applicable accounting requirements and with the published rules
and regulations of the SEC with respect thereto, have been prepared in
accordance with United States generally accepted accounting principles applied
on a consistent basis during the periods involved (except as may be indicated in
the notes thereto or, in the case of the unaudited statements, to normal audit
adjustments) and fairly present (subject, in the case of the unaudited
statements, to normal audit adjustments) the consolidated financial position of
Parent and its consolidated Subsidiaries as at the dates thereof and the
consolidated results of their operations and cash flows for the periods then
ended. Except as reflected, reserved against or otherwise disclosed in the
financial statements of Parent included in the Parent SEC Documents or as
otherwise disclosed in the Parent SEC Documents, in each case filed prior to the
date of this Agreement, to the best knowledge of Parent, as of the date hereof,
neither Parent nor any of its Subsidiaries had any liabilities or obligations
(absolute, accrued, fixed, contingent or otherwise) material to Parent and its
Subsidiaries, other than liabilities incurred in the ordinary course of business
consistent with past practice.
 
     Section 5.6 Information in Disclosure Documents and Registration Statement.
 
     (a) None of the Offer Documents nor any of the information supplied by
Parent or any of its Subsidiaries specifically for inclusion in the Schedule
14D-9 will, at the respective times the Offer Documents (including any
amendments or supplements thereto) or the Schedule 14D-9 are filed with the SEC
or are first published, sent or given to stockholders, as the case may be,
contain any untrue statement of a material fact or omit to state any material
fact necessary in order to make the statements included therein, in light of the
circumstances under which they were made, not misleading. The Offer Documents
will comply as to form in all material respects with the applicable requirements
of the Exchange Act and the applicable rules and regulations thereunder.
 
     (b) The S-4 will not, at the time it becomes effective under the Securities
Act and at the Effective Time, contain any untrue statement of a material fact
or omit to state any material fact required to be stated therein or necessary to
make the statements therein, in light of the circumstances under which they were
made, not misleading. The S-4 will, when filed with the SEC by Parent, comply as
to form in all material respects with the provisions of the Securities Act and
the rules and regulations thereunder.
 
     (c) None of the information supplied by Parent or Sub from time to time in
writing specifically for inclusion or incorporation by reference in the Proxy
Statement will, at the date mailed to the Company's
 
                                       16
<PAGE>   24
 
stockholders and at the time of the meeting of stockholders to be held in
connection with the Merger, contain any untrue statement of a material fact or
omit to state any material fact required to be stated therein or necessary in
order to make the statements therein, in light of the circumstances under which
they are made, not misleading.
 
     (d) Notwithstanding the foregoing, Parent and Sub make no representation
with respect to statements made in any of the foregoing documents based on
information supplied by the Company specifically for inclusion therein.
 
     Section 5.7 Litigation.  Except as disclosed in the Parent SEC Documents
filed prior to the date of this Agreement, there is as of the date hereof no
suit, claim, action, proceeding or investigation pending or, to the best
knowledge of Parent, threatened, against Parent or any of its Subsidiaries
before any Governmental Entity which, individually or in the aggregate, would
have a material adverse effect on Parent and its Subsidiaries or a material
adverse effect on the ability of Parent or Sub to consummate the transactions
contemplated by this Agreement. Except as disclosed in the Parent SEC Documents
filed prior to the date of this Agreement, neither Parent nor any of its
Subsidiaries is subject to any outstanding order, writ, injunction or decree
which, individually or in the aggregate, would have a material adverse effect on
Parent and its Subsidiaries or a material adverse effect on the ability of
Parent or Sub to consummate the transactions contemplated hereby.
 
     Section 5.8 No Material Adverse Change; Material Agreements.  Except as
disclosed in the Parent SEC Documents filed prior to the date of this Agreement,
(i) since December 31, 1993, there has not been any action which would be
prohibited under Section 6.2 were it to occur after the date of this Agreement
or any material adverse change in the assets, business, results of operations or
financial condition of Parent and its Subsidiaries, other than changes arising
from general economic or industry conditions, and (ii) as of the date of this
Agreement, neither Parent nor any of its Subsidiaries has become a party to any
agreement or amendment to an existing agreement which would be required to be
filed by Parent as an exhibit to its next Annual Report on Form 10-K. The
transactions contemplated by this Agreement will not constitute a "change of
control" under, require the consent from or the giving of notice to a third
party pursuant to, or accelerate vesting or repurchase rights under the terms,
conditions or provisions of any note, bond, mortgage, indenture, license, lease,
contract, agreement or other instrument or obligation to which Parent or any of
its Subsidiaries is a party or by which any of them or any of their properties
or assets may be bound, except where the adverse consequences resulting from
such change of control or where the failure to obtain such consents or provide
such notices would not, individually or in the aggregate, have a material
adverse effect on Parent and its Subsidiaries; provided, however, that the
foregoing exception will not be applicable to any (i) note, bond, mortgage,
indenture, contract, agreement or other instrument or obligation relating to
indebtedness for borrowed money of Parent or any of its Subsidiaries with an
outstanding principal amount of less than $5,000,000 or (ii) employment,
compensation, termination or severance agreement, contract or other obligation
of Parent or any of its Subsidiaries.
 
     Section 5.9 Taxes.  Parent and each of its Subsidiaries has duly filed all
federal, state, local and foreign income Tax Returns required to be filed by it,
and all other material Tax Returns required to be filed by it, except in the
case of such other Tax Returns where the failure to file will not have a
material adverse effect on Parent and its Subsidiaries, and Parent, in all
material respects, has duly paid or caused to be paid all Taxes shown to be due
on such Tax Returns in respect of the periods covered by such returns and has
made adequate provision in Parent's financial statements for payment of all
Taxes anticipated to be payable in respect of all taxable periods or portions
thereof ending on or before the date hereof. Section 5.9 of the Disclosure
Schedule delivered by Parent to the Company pursuant to this Agreement (the
"Parent Disclosure Schedule") lists the taxable periods through which the income
Tax Returns required to be filed by Parent have been examined by the IRS or
other appropriate tax authority, or the period during which any assessments may
be made by the IRS or other tax authority has expired. All material deficiencies
and assessments asserted as a result of such examinations or other audits by
federal, state, local or foreign taxing authorities have been paid, fully
settled or adequately provided for in Parent's financial statements and no issue
or claim has been asserted in writing for Taxes by any taxing authority for any
prior period, the adverse determination of which would result in a deficiency
which would have a material adverse effect on Parent and its Subsidiaries, other
than those
 
                                       17
<PAGE>   25
 
heretofore paid or provided for in Parent's financial statements. Except as set
forth on Section 5.9 of the Parent Disclosure Schedule, there are no outstanding
agreements or waivers extending the statutory period of limitation applicable to
any income Tax Return of Parent or its Subsidiaries.
 
     Section 5.10 Parent Not an Interested Stockholder or an Acquiring
Person.  As of the date of this Agreement, neither Parent nor, to the best
knowledge of Parent, any of its affiliates is an "Interested Stockholder" as
such term is defined in Section 203 of the DGCL, or an "Acquiring Person" as
such term is defined in the Company Rights Agreement.
 
     Section 5.11 Interim Operations of Sub.  Sub was formed solely for the
purpose of engaging in the transactions contemplated hereby, has engaged in no
other business activities and has conducted its operations only as contemplated
hereby.
 
     Section 5.12 Financing.  Parent and Sub have, or will obtain on a timely
basis, all of the funds necessary to consummate the Offer and the Merger.
 
     Section 5.13 Purchase of Option Shares.  The Purchaser will acquire any
shares of Company Common Stock pursuant to the Stock Option Agreement for its
own account and not with a view to distribution thereof.
 
                                   ARTICLE VI
 
                                   COVENANTS
 
     Section 6.1 Conduct of Business of the Company.  Except as contemplated by
this Agreement or with the prior written consent of Parent, which consent is
hereby given with respect to actions described in Section 6.1 of the Company
Disclosure Schedule, during the period from the date of this Agreement to the
Effective Time, the Company will, and will cause each of its Subsidiaries to,
conduct its operations only in the ordinary and usual course of business
consistent with past practice and will use all reasonable efforts, and will
cause each of its Subsidiaries to use all reasonable efforts, to preserve intact
its present business organization, keep available the services of its present
officers and employees and preserve its relationships with licensors, licensees,
customers, suppliers, employees and any others having business dealings with it,
in each case in all material respects. Without limiting the generality of the
foregoing, and except as otherwise expressly provided in this Agreement, the
Company will not, and will not permit any of the Subsidiaries to, prior to the
Effective Time, without the prior written consent of Parent, not to be
unreasonably withheld:
 
     (a) adopt any amendment to its certificate of incorporation or by-laws or
comparable organizational documents or to the Company Rights Agreement;
 
     (b) except for issuances of capital stock of the Company's Subsidiaries to
the Company or a wholly-owned Subsidiary of the Company, issue, reissue, sell or
pledge or authorize or propose the issuance, reissuance, sale or pledge of
additional shares of capital stock of any class, or securities convertible into
capital stock of any class, or any rights, warrants or options to acquire any
convertible securities or capital stock, other than the issuance of shares of
Company Common Stock (and attached Company Rights) upon the exercise of stock
options or vesting of restricted or deferred stock unit awards outstanding on
the date of this Agreement or upon conversion of Company Preferred Stock, in
each case in accordance with their present terms;
 
     (c) declare, set aside or pay any dividend or other distribution (whether
in cash, securities or property or any combination thereof) in respect of any
class or series of its capital stock, except that (i) the Company may continue
to pay regular dividends on the Company Common Stock and Company Preferred Stock
consistent with past practice, (ii) TGPL may continue to pay regular dividends
and make annual sinking fund payments on its cumulative first preferred stock
consistent with past practice and (iii) any wholly owned Subsidiary of the
Company may pay dividends and make distributions to the Company or any of the
Company's wholly owned Subsidiaries;
 
     (d) adjust, split, combine, subdivide, reclassify or redeem, purchase or
otherwise acquire, or propose to redeem or purchase or otherwise acquire, any
shares of its capital stock, other than pursuant to the Corpus Christi Lease or
in connection with tax withholding features under the Company Plans;
 
                                       18
<PAGE>   26
 
     (e) (i) incur, assume or pre-pay any long-term debt or incur or assume any
short-term debt, except that the Company and its Subsidiaries may incur or
pre-pay debt in the ordinary course of business consistent with past practice or
the cash forecasts disclosure on Schedule 6.1 of the Company Disclosure Schedule
under existing lines of credit and may repurchase any of the Company's 11 1/4%
Notes due 1999 (the "Company Notes") in a manner consistent with the provisions
of Section 6.18, (ii) assume, guarantee, endorse or otherwise become liable or
responsible (whether directly, contingently or otherwise) for the obligations of
any other person except in the ordinary course of business consistent with past
practice, or (iii) make any loans, advances or capital contributions to, or
investments in, any other person except in the ordinary course of business
consistent with past practice and except for loans, advances, capital
contributions or investments between any wholly owned Subsidiary and the Company
or another wholly owned Subsidiary;
 
     (f) settle or compromise any suit or claim or threatened suit or claim
relating to the transactions contemplated hereby;
 
     (g) except for (i) increases in salary, wages and benefits of employees of
the Company or its Subsidiaries (other than executive or corporate officers of
the Company) in accordance with past practice, (ii) increases in salary, wages
and benefits granted to employees of the Company or its Subsidiaries (other than
executive or corporate officers of the Company) in conjunction with promotions
or other changes in job status consistent with past practice or required under
existing agreements, (iii) increases in salary, wages and benefits to employees
of the Company pursuant to collective bargaining agreements entered into in the
ordinary course of business consistent with past practice, and (iv) the
consummation of the pending merger of the Company's Tran$tock Employee Stock
Ownership Plan with the Company's Thrift Plan, increase the compensation or
fringe benefits payable or to become payable to its directors, officers or
employees (whether from the Company or any of its Subsidiaries), or pay any
benefit not required by any existing plan or arrangement (including, the
granting of, or waiver of performance or other vesting criteria under, stock
options, stock appreciation rights, shares of restricted stock or deferred stock
or performance units) or grant any severance or termination pay to (except
pursuant to existing agreements or policies), or enter into any employment or
severance agreement with, any director, officer or other key employee of the
Company or any of its Subsidiaries or establish, adopt, enter into, terminate or
amend any collective bargaining, bonus, profit sharing, thrift, compensation,
stock option, restricted stock, pension, retirement, welfare, deferred
compensation, employment, termination, severance or other employee benefit plan,
agreement, trust, fund, policy or arrangement for the benefit or welfare of any
directors, officers or current or former employees, except to the extent such
termination or amendment is required by applicable law; provided, however, that
nothing herein will be deemed to prohibit the payment of benefits as they become
payable;
 
     (h) except as set forth in Section 6.1 of the Company Disclosure Schedule,
acquire, sell, lease or dispose of any assets or securities which are material
to the Company and its Subsidiaries, or enter into any commitment to do any of
the foregoing or enter into any material commitment or transaction outside the
ordinary course of business consistent with past practice other than
transactions between a wholly owned Subsidiary and the Company or another wholly
owned Subsidiary;
 
     (i) (i) modify, amend or terminate any contract, (ii) waive, release,
relinquish or assign any contract (including any insurance policy) or other
right or claim, or (iii) cancel or forgive any indebtedness owed to the Company
or its Subsidiaries, other than in each case in a manner in the ordinary course
of business consistent with past practice or which is not material to the
business of the Company and its Subsidiaries;
 
     (j) make any tax election not required by law or settle or compromise any
tax liability, in either case that is material to the Company and its
Subsidiaries;
 
     (k) change any of the accounting principles or practices used by it except
as required by the SEC, the Financial Accounting Standards Board or the Federal
Energy Regulatory Commission under the Uniform System of Accounts; or
 
     (l) agree in writing or otherwise to take any of the foregoing actions or
any action which would make any representation or warranty in this Agreement
untrue or incorrect in any material respect.
 
                                       19
<PAGE>   27
 
     Section 6.2 Conduct of Business of Parent.  Except as contemplated by this
Agreement, Parent will not, and will not permit any of its Subsidiaries to,
prior to the Effective Time, without the prior written consent of the Company,
not to be unreasonably withheld:
 
     (a) adopt any amendment to its certificate of incorporation or by-laws or
comparable organizational documents;
 
     (b) except for issuances of capital stock of Parent's Subsidiaries to
Parent or a wholly-owned Subsidiary of Parent and except as set forth on Section
6.2 of the Parent Disclosure Schedule, issue, reissue, sell or pledge or
authorize or propose the issuance, reissuance, sale or pledge of additional
shares of capital stock of any class, or securities convertible into capital
stock of any class, or any rights, warrants or options to acquire any
convertible securities or capital stock, other than the issuance of shares of
Parent Common Stock upon the exercise of stock options or vesting of deferred
stock awards outstanding on the date of this Agreement in accordance with their
present terms;
 
     (c) declare, set aside or pay any dividend or other distribution (whether
in cash, securities or property or any combination thereof) in respect of any
class or series of its capital stock, except that (i) Parent may continue to pay
regular cash dividends on the Parent Common Stock and the Parent Preferred Stock
and (ii) any Subsidiary of Parent may pay dividends or make distributions;
 
     (d) other than purchases pursuant to its existing program to repurchase
shares of Parent Common Stock for an aggregate purchase price of up to
$800,000,000 and shares of Parent Preferred Stock for an aggregate purchase
price of up to $100,000,000 (under which approximately $406.8 million and $6.4
million, respectively, of purchases have been made as of the date hereof) and in
connection with the exercise of options under the Parent Plans, adjust, split,
combine, subdivide, reclassify or redeem, purchase or otherwise acquire, or
propose to redeem or purchase or otherwise acquire, any shares of its capital
stock;
 
     (e) except as set forth on Section 6.2 of the Parent Disclosure Schedule,
acquire, sell, lease or dispose of any assets or securities which are material
to Parent and its Subsidiaries, or enter into any commitment to do any of the
foregoing other than transactions between a wholly owned Subsidiary and Parent
or another wholly owned Subsidiary;
 
     (f) settle or compromise any suit or claim or threatened suit or claim
relating to the transactions contemplated hereby;
 
     (g) change any of the accounting principles or practices used by it except
as required by the SEC, the Financial Accounting Standards Board or the Federal
Energy Regulatory Commission under the Uniform Systems of Accounts; or
 
     (h) agree in writing or otherwise to take any of the foregoing actions or
any action which would make any representation or warranty in this Agreement
untrue or incorrect in any material respect.
 
     Section 6.3 Reasonable Best Efforts.  Subject to the terms and conditions
of this Agreement, each of the parties hereto will use its reasonable best
efforts to take, or cause to be taken, all actions, and to do, or cause to be
done, in each case consistent with the fiduciary duties of their respective
Boards of Directors as advised by counsel, all things necessary, proper or
advisable under applicable laws and regulations to consummate and make effective
the transactions contemplated by this Agreement or the Stock Option Agreement,
including (i) the prompt preparation and filing with the SEC of the S-4 and the
Proxy Statement, (ii) such actions as may be required to have the S-4 declared
effective under the Securities Act and the Proxy Statement cleared by the SEC,
in each case as promptly as practicable, including by consulting with each other
as to, and responding promptly to, any SEC comments with respect thereto, and
(iii) such actions as may be required to be taken under applicable state
securities or blue sky laws in connection with the issuance of shares of Parent
Common Stock (and the attached Parent Rights) and Parent New Preferred Stock
contemplated hereby. Each party will promptly consult with the other with
respect to, provide any necessary information with respect to and provide the
other (or its counsel) copies of, all filings made by such party with any
Governmental Entity in connection with this Agreement and the transactions
contemplated hereby. In addition, if at any time prior to the Effective Time any
event or circumstance relating to either the Company
 
                                       20
<PAGE>   28
 
or Parent or any of their respective Subsidiaries, or any of their respective
officers or directors, should be discovered by the Company or Parent, as the
case may be, and which should be set forth in an amendment or supplement to the
S-4 or the Proxy Statement, the discovering party will promptly inform the other
party of such event or circumstance.
 
     Section 6.4 Letter of the Company's Accountants.  Following receipt by
Arthur Andersen LLP, the Company's independent auditors, of an appropriate
request from Parent pursuant to Statement on Auditing Standards ("SAS") No. 72,
the Company will use its reasonable best efforts to cause to be delivered to
Parent a letter of Arthur Andersen LLP, dated a date within two business days
before the date on which the S-4 will become effective and addressed to Parent,
in form and substance reasonably satisfactory to Parent and customary in scope
and substance for letters delivered by independent public accountants in
connection with registration statements similar to the S-4, which letter will be
brought down to the Effective Time.
 
     Section 6.5 Letter of Parent's Accountants.  Following receipt by Ernst &
Young, LLP, Parent's independent auditors, of an appropriate request from the
Company pursuant to SAS No. 72, Parent will use its reasonable best efforts to
cause to be delivered to the Company a letter of Ernst & Young, LLP., dated a
date within two business days before the date on which the S-4 will become
effective and addressed to the Company, in form and substance reasonably
satisfactory to the Company and customary in scope and substance for letters
delivered by independent public accountants in connection with registration
statements similar to the S-4, which letter will be brought down to the
Effective Time.
 
     Section 6.6 Access to Information.  Upon reasonable notice, the Company and
Parent will each (and will cause each of their respective Subsidiaries to)
afford to the officers, employees, accountants, counsel and other
representatives of the other, access, during normal business hours during the
period prior to the Effective Time, to all its properties, facilities, books,
contracts, commitments and records and other information as reasonably requested
by such party and, during such period, each of the Company and Parent will (and
will cause each of their respective Subsidiaries to) furnish promptly to the
other (a) a copy of each report, schedule, registration statement and other
document filed or received by it during such period pursuant to the requirements
of United States federal securities laws or regulations, and (b) all other
information concerning its business, properties and personnel as such other
party may reasonably request. The parties will hold any such information which
is nonpublic in confidence in accordance with the terms of the Confidentiality
Agreement, dated October 10, 1994, between Parent and the Company (the
"Confidentiality Agreement"), and in the event of termination of this Agreement
for any reason each party will promptly comply with the terms of the
Confidentiality Agreement.
 
     Section 6.7 Company Stockholders Meeting.  The Company will call a meeting
of its stockholders for the purpose of voting upon this Agreement (insofar as it
relates to the Merger), the Merger and related matters and use its reasonable
best efforts to hold such meeting as soon as practicable following consummation
of the Offer. The Company will, through its Board of Directors, recommend to its
stockholders approval of such matters; provided, however, that nothing contained
in this Section 6.7 will require the Board of Directors of the Company to take
any action or refrain from taking any action which the Board determines in good
faith with advice of counsel could reasonably be expected to result in a breach
of its fiduciary duties under applicable law. Parent agrees to cause all shares
of Company Common Stock acquired by it pursuant to the Offer or pursuant to the
Stock Option Agreement or both to be represented at such meeting of the
Company's stockholders and to be voted at such meeting in favor of the approval
and adoption of this Agreement (insofar as it relates to the Merger) and the
Merger and the other transactions contemplated hereby.
 
     Section 6.8 Stock Exchange Listing.  Parent will use its reasonable best
efforts to cause the Parent Common Stock (and attached Parent Rights) to be
issued in the Merger to be approved for listing on the NYSE not later than the
Effective Time, subject to official notice of issuance.
 
     Section 6.9 Company Plans.
 
     (a) On or prior to the Effective Time, the Company and its Board of
Directors (or a committee thereof) will take all action necessary to implement
the provisions contained in Sections 6.9(b) and 6.9(c).
 
                                       21
<PAGE>   29
 
     (b) Except as otherwise agreed with individual option holders, at the
Effective Time, (i) each then outstanding option to purchase shares of Company
Common Stock (a "Company Stock Option") under the Company Plans, whether vested
or unvested, will become fully exercisable and vested, (ii) each Company Stock
Option which is then outstanding will be cancelled and (iii) in consideration of
such cancellation, at the election of the option holder, which may be allocated
to either or both elections, (x) the Company will pay to such holders of Company
Stock Options an amount in respect thereof equal to the product of (A) the
excess, if any, of the Per Share Amount over the respective exercise price
thereof and (B) the number of shares of Company Common Stock subject thereto,
respectively, or (y) Parent will issue an option described in Section 6.9(c) or
6.9(d), as applicable (a "Replacement Option").
 
     (c) The Replacement Option with respect to each Company Stock Option, the
exercise price for which exceeds $35 per share, will be an option to acquire, on
the same terms and conditions as were applicable under such Company Stock Option
(except that it will be subject to a vesting period ending on the first
anniversary of the Effective Time), (A) an amount in cash equal to the product
of $10.50 times the number of shares of Company Common Stock purchasable under
such Company Stock Option immediately prior to the Effective Time and (B) the
number of shares of Parent Common Stock equal to the product of .25 and the
number of shares of Company Common Stock purchasable under such Company Stock
Option immediately prior to the Effective Time. Parent will cause such options
to continue to vest and to remain exercisable following the termination of the
option holder's employment with Parent and its affiliates in accordance with its
past practice relative to Parent's current employees; provided, that with
respect to any Current Employee whose employment with Parent or its affiliates
is terminated other than voluntarily by the employee or involuntarily for cause
or as a result of retirement, Parent will cause such options to continue to vest
until the earlier of (i) six months following such termination and (ii) the end
of the term of such Option, as in effect immediately before such termination.
All of the foregoing payments and issuances of shares in connection with such
cancellations will be made either net of applicable withholding taxes or upon
payment of required withholding taxes by the option holders.
 
     (d) The Replacement Option with respect to each Company Stock Option, the
exercise price for which is less than or equal to $35 per share, will be an
option to acquire, on the same terms and conditions as were applicable under
such Company Stock Option, the same number of shares of Parent Common Stock as
the holder of such Company Stock Option would have been entitled to receive
pursuant to the Merger had such holder exercised such option in full immediately
prior to the Effective Time (not taking into account whether or not such option
was in fact exercisable), at a price per share equal to (A) the aggregate
exercise price for the shares of Company Common Stock deemed otherwise
purchasable pursuant to such Company Stock Option divided by (B) the number of
full shares of Parent Common Stock deemed purchasable pursuant to such Company
Stock Option. All of the foregoing payments and issuances of shares in
connection with such cancellations will be made either net of applicable
withholding taxes or upon payment of required withholding taxes by the
optionholders.
 
     (e) Except as provided herein or as otherwise agreed to by the parties, and
to the extent permitted by the Company Plans, (i) the Company Plans will
terminate as of the Effective Time and the provisions in any other plan, program
or arrangement, providing for the issuance or grant of any other interest in
respect of the capital stock of the Company or any of its Subsidiaries will be
deleted as of the Effective Time and (ii) the Company will use all reasonable
efforts to ensure that following the Effective Time no holder of Company Stock
Options or any participant in the Company Plans or any other plans, programs or
arrangements will have any right thereunder to acquire any equity securities of
the Company, the Surviving Corporation or any Subsidiary thereof.
 
     (f) The Company will use reasonable efforts to obtain an agreement
substantially in the form attached to Section 6.9(f) of the Company Disclosure
Schedule on or prior to the date of commencement of the Offer with the employee
identified on such Schedule.
 
     Section 6.10 Other Employee Benefit Plans.
 
     (a) Except as otherwise contemplated by this Agreement, the employee
benefit plans (as defined in Section 3(3) of ERISA) and other employee plans,
programs and policies other than salary (collectively, the
 
                                       22
<PAGE>   30
 
"Employee Benefit Plans") of the Company and its Subsidiaries in effect at the
date of this Agreement will, to the extent practicable, remain in effect until
otherwise determined after the Effective Time and, to the extent such Employee
Benefit Plans are not continued, Parent will maintain Employee Benefit Plans
with respect to employees of the Company and its Subsidiaries which are no less
favorable, in the aggregate, than the least favorable of: (i) those Employee
Benefit Plans covering employees of Parent from time to time; (ii) those
Employee Benefit Plans of the Company and its Subsidiaries that are in effect on
the date of this Agreement other than the Tran$tock Plan; or (iii) Employee
Benefit Plans that are reasonably competitive with respect to the industry in
which the employer of the affected employees competes; provided, that in any
event, until December 31, 1995, the Surviving Corporation will provide
individuals who are employees of the Company and its Subsidiaries as of the
Effective Time ("Current Employees") with Employee Benefit Plans, other than a
nonqualified, unfunded plan maintained primarily to provide deferred
compensation benefits to a select group of "management or highly compensated
employees" within the meaning of Sections 201, 301, and 401 of ERISA, that are
no less favorable in the aggregate than those provided to Current Employees by
the Company and for its Subsidiaries immediately before the Closing Date. In the
case of benefit plans which are continued and under which the employees'
interests are based upon Company Common Stock, such interests will be based on
Parent Common Stock in an equitable manner.
 
     (b) Without limiting the generality of Section 6.10(a), Parent will cause
the Surviving Corporation to (i) honor (A) in accordance with their terms all
individual employment, severance, termination and indemnification agreements
which by their express terms may not be unilaterally amended by the Company or
any of its Subsidiaries and (B) without modification all other employee
severance plans, policies, employment and severance agreements and
indemnification arrangements of the Company or any of its Subsidiaries that are
set forth in Section 6.10(b)(i) of the Company Disclosure Schedule as such
plans, policies, or agreements are in effect on the date of this Agreement, or
as they may be thereafter amended prior to the consummation of the Merger with
the consent of Parent, through the later of (1) December 31, 1995, (2) the
termination date specified in such document or (3) the date specified in Section
6.10(b)(i) of the Company Disclosure Schedule, (ii) waive any limitations
regarding pre-existing conditions of Current Employees and their eligible
dependents under any welfare or other employee benefit plans of Parent and its
affiliates in which they participate after the Effective Time (except to the
extent that such limitations would have applied under the analogous plan of the
Company and its subsidiaries immediately before the Effective Time), (iii) for
all purposes under the post-retirement welfare benefit plans and policies of
Parent and its affiliates, treat Current Employees in the same manner as
similarly situated employees of Parent who were hired by Parent before January
1, 1992 in accordance with the terms of such plans and policies as then in
effect, as any such plans and policies are modified by Parent or such affiliates
from time to time, and (iv) for all other purposes under all Employee Benefit
Plans applicable to employees of the Company and its subsidiaries, treat all
service with the Company or any of its subsidiaries by Current Employees before
the Closing as service with Parent and its Subsidiaries, except to the extent
such treatment would result in duplication of benefits or would violate
applicable law.
 
     (c) Except as otherwise agreed by Parent and individual restricted
stockholders, at the Effective Time, each share of Company Common Stock which
immediately prior to the Effective Time was subject to restrictions on transfer,
whether vested or unvested, will become fully vested and freely transferable and
will be converted into the right to receive unrestricted shares of Parent Common
Stock (with attached Parent Rights) pursuant to Section 3.1(d). With respect to
all Restricted Stock and Restricted Stock Units granted under the Company's 1983
Incentive Plan or the Company's 1991 Stock Incentive Plan that were not vested
immediately before the consummation of the Offer, the Performance Period (as
defined in such Plans) shall be deemed to have ended as of the day (the
"Determination Date") immediately preceding the date of the consummation of the
Offer, and the number of shares of Restricted Stock that would be vested (the
"Vested Restricted Stock"), and the number of shares of Company Common Stock
that would be issuable in payment of Restricted Stock Units (the "Vested RSUs"),
shall be computed, and shall vest, based on the Company's total shareholder
return through the Determination Date, with the value of the Company Common
Stock being deemed to be $17.50 per share and the Performance Criteria (as
defined in such Plans) being those that were in effect on the Determination
Date. As soon as practicable after the consummation of the Offer, each employee
(or beneficiary thereof) holding Vested Restricted Stock and/or Vested RSUs
shall be paid a cash
 
                                       23
<PAGE>   31
 
payment in cancellation thereof equal to $17.50 per share of Vested Restricted
Stock and $17.50 per share of Company Common Stock issuable pursuant to Vested
RSUs.
 
     (d) Parent will cause the Surviving Corporation or its successor by merger
to continue in full force and effect for a period of not less than six years
from the Effective Time the indemnification provisions contained in Article
Eighth of the Third Restated Certificate of Incorporation attached as Exhibit
2.4 hereto provided that, in the event any claim is asserted or made within such
six-year period, all rights to indemnification in respect of any such claim will
continue until disposition of any and all such claims. For a period of six years
after the Effective Time, Parent will, or will cause the Company to, provide
directors' and officers' liability insurance having substantially the same terms
and conditions and providing at least the same coverage and amounts as the
directors' and officers' liability insurance maintained by the Company at the
Effective Time for all directors and officers of the Company and its
Subsidiaries, who served as such at or within one year prior to the Effective
Time, provided that Parent will not be required to pay an annual premium for
such insurance in excess of the last annual premium paid prior to the date
hereof (but in such case will purchase as much coverage as possible for such
amount).
 
     Section 6.11 Exclusivity.
 
     (a) Except as provided in Section 6.11(b), until the earlier of the
termination of this Agreement pursuant to Section 8.1 or the purchase of shares
of Company Common Stock pursuant to the Offer, the Company will not, nor will it
permit its officers, directors, Subsidiaries, representatives or agents,
directly or indirectly, to, do any of the following: (i) negotiate, undertake,
authorize, propose or enter into, either as the proposed surviving, merged,
acquiring or acquired corporation, any transaction (other than the Offer and the
Merger) involving any disposition or other change of ownership of a substantial
portion of the Company's stock or assets (an "Acquisition Transaction"); (ii)
solicit or initiate the submission of a proposal or offer in respect of, or
engage in negotiations concerning, an Acquisition Transaction; or (iii) furnish
or cause to be furnished to any corporation, partnership, person or other entity
or group (other than the other party and its representatives) (a "Person") any
non-public information concerning the business, operations, properties or assets
of the Company in connection with an Acquisition Transaction; provided, nothing
herein will prohibit the Company's Board of Directors from taking and disclosing
to the Company's stockholders a position with respect to a tender offer pursuant
to Rules 14d-9 and 14e-2 promulgated under the Exchange Act. The Company will
inform Parent by telephone within two business days of its receipt of any
proposal or bid (including the terms thereof and the Person making such proposal
or bid) in respect of any Acquisition Transaction.
 
     (b) Notwithstanding anything else contained in this Section 6.11, the
Company and its officers, directors, subsidiaries, representatives and agents
may engage in discussions or negotiations with, and may furnish information to,
a third party who, or representatives of a third party who, makes a written
proposal with respect to an Acquisition Transaction if (i) the Company's Board
of Directors determines in good faith after consultation with its financial
advisors that such proposal may reasonably be expected to result in a
transaction that is financially superior to the transactions contemplated by
this Agreement, or (ii) the Board of Directors of the Company determines in good
faith with advice of outside counsel that failure to do so could reasonably be
expected to result in a breach of its fiduciary duties under applicable law. If
the Company accepts a proposal for or otherwise engages in any Acquisition
Transaction (other than the Offer or the Merger), it will promptly pay to Parent
in reimbursement for Parent's expenses an amount in cash (not to exceed
$12,000,000) equal to the aggregate amount of Parent's documented out-of-pocket
expenses incurred in connection with pursuing the transactions contemplated by
this Agreement as certified in good faith by Parent and with reasonable detail.
 
     Section 6.12 Fees and Expenses.  Whether or not the Merger is consummated,
all costs and expenses incurred in connection with this Agreement and the
transactions contemplated hereby will be paid by the party incurring such
expenses.
 
     Section 6.13 Brokers or Finders.  Each of Parent and the Company
represents, as to itself, its Subsidiaries and its affiliates, that no agent,
broker, investment banker, financial advisor or other firm or person is or will
be entitled to any brokers' or finder's fee or any other commission or similar
fee in connection
 
                                       24
<PAGE>   32
 
with any of the transactions contemplated by this Agreement or the Stock Option
Agreement except Merrill Lynch & Co., whose fees and expenses will be paid by
the Company in accordance with the Company's agreement with such firm, a copy of
which has been provided to Parent, and Smith Barney Inc., whose fees and
expenses will be paid by Parent in accordance with Parent's agreement with such
firm, a copy of which has been provided to the Company, and each of Parent and
the Company will indemnify and hold the other harmless from and against any and
all claims, liabilities or obligations with respect to any other brokers' or
finders' fees, commissions or expenses asserted by any person on the basis of
any act or statement alleged to have been made by such party or its Subsidiary
or affiliate.
 
     Section 6.14 Company Rights Agreement.  The Company will redeem the Company
Rights effective immediately prior to Parent's acceptance for payment of shares
of Company Common Stock pursuant to the Offer and will not otherwise redeem the
Company Rights, or amend or terminate the Company Rights Agreement, unless in
each such case the Board determines in good faith with the advice of outside
counsel that complying with any such covenant could reasonably be expected to
result in a breach of its fiduciary duties under applicable law. The Company
agrees that the Offer will provide, and require that tendering stockholders
confirm, that Parent will be entitled to receive and retain the amounts paid in
redemption of all Company Rights attached to shares of Company Common Stock
acquired pursuant to the Offer.
 
     Section 6.15 Rule 145.  The Company will use its reasonable best efforts to
cause all persons who, at the time of the meeting of the Company's stockholders
to approve the Merger, may be deemed to be affiliates of the Company as that
term is used in Rule 145 under the Securities Act and who will become the
beneficial owners of Parent Common Stock (and attached Parent Rights) and Parent
New Preferred Stock pursuant to the Merger to execute "affiliates' letters" in
customary form prior to the Effective Time. Parent and the Surviving Corporation
will use their reasonable efforts to comply with the provisions of Rule 144(c)
under the Securities Act in order that such affiliates may resell such Parent
Common Stock (and attached Parent Rights) and Parent New Preferred Stock
pursuant to Rule 145(d) under the Securities Act.
 
     Section 6.16 Notification of Certain Matters.  The Company will give prompt
notice to Parent, and Parent will give prompt notice to the Company, of (a) the
occurrence, or non-occurrence, of any event the occurrence, or non-occurrence,
of which would be likely to cause (i) any representation or warranty contained
in this Agreement to be untrue or inaccurate in any material respect or (ii) any
covenant, condition or agreement contained in this Agreement not to be complied
with or satisfied in any material respect and (b) any failure of the Company or
Parent, as the case may be, to comply with or satisfy any covenant, condition or
agreement to be complied with or satisfied by it hereunder in any material
respect; provided, however, that the delivery of any notice pursuant to this
Section 6.16 will not limit or otherwise affect the remedies available hereunder
to the party receiving such notice.
 
     Section 6.17 Interim Company Preferred Stock Dividend.  The Company will
declare a dividend on each share of the Company Preferred Stock to holders of
record of such shares as of the close of the business day next preceding the
Effective Time in an amount equal to the product of (i) a fraction, (x) the
numerator of which equals the number of days between the payment date with
respect to the most recent regular dividend paid by the Company and the
Effective Time and (y) the denominator of which equals 91 and (ii) the amount of
the regular quarterly dividend paid by the Company on the relevant series of
Company Preferred Stock.
 
     Section 6.18 Company Debt Agreements.  The Company will (a) promptly seek
agreement, on terms reasonably acceptable to Parent, of the banks party to the
Company's revolving credit and letter of credit reimbursement agreements to (i)
amend such agreements to provide that the execution by the Company of this
Agreement and the Stock Option Agreement and the purchase of shares of Company
Common Stock pursuant to the Offer or the Stock Option Agreement do not
constitute an event permitting the banks which are parties thereto to accelerate
the amounts outstanding under such agreements or establish cash collateral
accounts, (ii) amend such agreements to permit the consummation of the Merger,
and (iii) waive the interest rate increase otherwise applicable by reason of
such events, (b) select the latest notice and repurchase dates permitted under
the indenture governing the Company Notes in respect of the "change of control"
effected by consummation of the Offer and (c) in the event that such repurchase
date occurs prior to the Merger,
 
                                       25
<PAGE>   33
 
cooperate with Parent in arranging financing on terms reasonably acceptable to
Parent to finance any required repurchase of Company Notes.
 
                                  ARTICLE VII
 
                                   CONDITIONS
 
     Section 7.1 Conditions to Each Party's Obligation To Effect the Merger.
The respective obligations of the parties to effect the Merger will be subject
to the satisfaction, on or prior to the Closing Date, of the following
conditions:
        
     (a) Offer.  Parent has accepted for purchase and paid for shares of Company
Common Stock pursuant to the Offer; provided, that this condition will be deemed
satisfied with respect to Parent if Parent will have failed to purchase shares
of Company Common Stock pursuant to the Offer in violation of the terms of the
Offer.
 
     (b) Stockholder Approval.  This Agreement (insofar as it relates to the
Merger) and the Merger have been approved and adopted by the affirmative vote of
the holders of Company Common Stock entitled to cast at least a majority of the
total number of votes entitled to be cast by holders of Company Common Stock.
 
     (c) HSR Approval.  Any waiting period under the HSR Act applicable to the
Merger has expired or been terminated.
 
     (d) Registration Statement.  The S-4 has become effective under the
Securities Act and is not the subject of any stop order or proceeding seeking a
stop order. Parent has received all material state securities or blue sky
permits and other authorizations necessary to issue the shares of Parent Common
Stock (and attached Parent Rights) and Parent New Preferred Stock pursuant to
this Agreement.
 
     (e) No Injunctions or Restraints.  No temporary restraining order,
preliminary or permanent injunction or other order issued by any court of
competent jurisdiction or other legal restraint or prohibition preventing the
consummation of the Merger is in effect (each party agreeing to use all
reasonable efforts to have any such order reversed or injunction lifted).
 
     (f) Listing Matters.  The Parent Common Stock (and the attached Parent
Rights) has been approved for listing on the NYSE, subject to official notice of
issuance.
 
     (g) No Action.  No action, suit or proceeding by any Governmental Entity
before any court or governmental or regulatory authority is pending against the
Company, Parent or Sub or any of their Subsidiaries challenging the validity or
legality of the transactions contemplated by this Agreement other than actions,
suits or proceedings as to which Parent had actual knowledge at the time of
acceptance for payment of shares of Company Common Stock pursuant to the Offer
or which, in the reasonable opinion of counsel to the party asserting such
condition, do not have a substantial likelihood of resulting in a material
adverse judgment.
 
     Section 7.2 Conditions of Obligations of Parent and Sub.  The obligations
of Parent and Sub to effect the Merger are further subject to the Company not
having failed to perform its material obligations required to be performed by it
under Section 6.1 at or prior to the Closing Date, other than any such failures
to perform as to which Parent had actual knowledge at the time of acceptance for
payment of shares of Company Common Stock pursuant to the Offer.
 
     Section 7.3 Conditions of Obligations of the Company.  The obligation of
the Company to effect the Merger is further subject to Parent and Sub not having
failed to perform their material obligations required to be performed by them
under Section 6.2 at or prior to the Closing Date, other than any such failures
to perform as to which the Company had actual knowledge at the time of
acceptance of payment for shares of Company Common Stock pursuant to the Offer.
 
                                       26
<PAGE>   34
 
                                  ARTICLE VIII
 
                           TERMINATION AND AMENDMENT
 
     Section 8.1 Termination.  This Agreement may be terminated at any time
prior to the Effective Time, whether before or after approval of the matters
presented in connection with the Merger by the stockholders of the Company:
 
     (a) by mutual consent of Parent and the Company by action of their
respective Boards of Directors (with any members of the Board of Directors of
the Company who may hereafter be designated by Parent abstaining);
 
     (b) by the Company if (i) Parent fails to commence the Offer as provided in
Section 1.1, (ii) the Offer expires or is terminated without any shares of
Company Common Stock being purchased thereunder, or (iii) Parent fails to
purchase validly tendered shares of Company Common Stock in violation of the
terms and conditions of the Offer or this Agreement;
 
     (c) by Parent if, due to an occurrence which has made it reasonably
impracticable to satisfy any of the conditions of the Offer set forth in Annex I
hereto at any time prior to the 90th day following the commencement of the
Offer, Parent (i) terminates the Offer or allows the Offer to expire without the
purchase of any shares of Company Common Stock thereunder, unless such
termination or expiration has been caused by or resulted from the failure of
Parent to perform in any material respect any of its covenants and agreements
contained in this Agreement or the Offer, or (ii) fails to pay for shares of
Company Common Stock pursuant to the Offer within 90 days after the date hereof,
unless such failure to pay for such shares is caused by or results from the
failure of Parent to perform in any material respect any of its covenants or
agreements contained in this Agreement or the Offer;
 
     (d) by either Parent or the Company if the Merger is not consummated before
June 30, 1995 despite the good faith effort of such party to effect such
consummation (unless solely by reason of the conditions provided for in Section
7.1(e), and 7.1(g) (in which case such date will be September 30, 1995) or the
failure to so consummate the Merger by such date is due to the action or failure
to act of the party seeking to terminate this Agreement, which action or failure
to act constitutes a breach of this Agreement);
 
     (e) by either Parent or the Company if any court of competent jurisdiction
has issued an injunction permanently restraining, enjoining or otherwise
prohibiting the consummation of the Offer or the Merger, which injunction has
become final and non-appealable;
 
     (f) prior to the expiration of the Offer, by Parent if the Company rescinds
its redemption of the Company Rights and all other conditions to consummation of
the Offer are satisfied, or the Board of Directors of the Company withdraws,
amends or modifies in a manner adverse to Parent its favorable recommendation of
the Offer or the Merger or promulgates any recommendation with respect to an
Acquisition Transaction (including a determination to take no position) other
than a recommendation to reject such Acquisition Transaction; or
 
     (g) prior to the expiration of the Offer, by the Company if (i) (A) any of
the representations and warranties of Parent contained in this Agreement were
incorrect in any material respect when made or have since become, and at the
time of termination remain, incorrect in any material respect, or (B) there has
been a material breach on the part of Parent in the covenants of Parent set
forth herein, or any failure on the part of Parent to comply with its material
obligations hereunder, or any other events or circumstances have occurred, such
that, in any such case, Parent could not satisfy on or prior to June 30, 1995,
any of the conditions to the Closing set forth in Sections 7.1 or 7.3, or (ii)
the Company receives a written offer with respect to an Acquisition Transaction
and the Board of Directors of the Company, after consulting with its outside
counsel and financial advisor, determines in good faith that such Acquisition
Transaction is more favorable to the Company's stockholders than the
transactions contemplated by this Agreement and, not later than the time of such
termination, the Company has paid the expense reimbursement required by Section
6.11(b).
 
     Section 8.2 Effect of Termination.  In the event of a termination of this
Agreement by either the Company or Parent as provided in Section 8.1, this
Agreement will forthwith become void and there will be no
 
                                       27
<PAGE>   35
 
liability or obligation on the part of Parent, Sub or the Company or their
respective officers or directors, other than (a)(i) the provisions of the last
sentence of Section 6.11(b), which will survive for a period of one year from
the date of any such termination if and only if (A) Parent has not received the
payment pursuant to Section 6.11(b) and (B) such termination of this Agreement
is pursuant to Section 8.1(b)(ii) by reason of the Minimum Condition having
failed to be satisfied, Section 8.1(c) by reason of the failure to satisfy the
conditions set forth in paragraph (e) or (f) of Annex I hereto, Section 8.1(f)
or Section 8.1(g)(ii), (ii) Sections 6.12 and 6.13, and (iii) the last sentence
of Section 6.6, and (b) to the extent that such termination results from the
willful breach by a party hereto of any of its covenants or agreements set forth
in this Agreement.
 
                                   ARTICLE IX
 
                                 MISCELLANEOUS
 
     Section 9.1 Nonsurvival of Representations and Warranties.  None of the
representations and warranties in this Agreement or in any instrument delivered
pursuant to this Agreement will survive the Effective Time.
 
     Section 9.2 Amendment.  This Agreement may be amended by the parties
hereto, by action taken or authorized by their respective Boards of Directors,
at any time before or after approval of the matters presented in connection with
the Merger by the stockholders of the Company, but, after any such approval, no
amendment will be made which by law requires further approval by such
stockholders without such further approval. This Agreement may not be amended
except by an instrument in writing signed on behalf of each of the parties
hereto.
 
     Section 9.3 Extension; Waiver.  At any time prior to the Effective Time,
the parties hereto, by action taken or authorized by the respective Boards of
Directors, may to the extent legally allowed, (i) extend the time for the
performance of any of the obligations or other acts of the other parties hereto,
(ii) waive any inaccuracies in the representations and warranties contained
herein or in any document delivered pursuant hereto and (iii) waive compliance
with any of the agreements or conditions contained here. Any agreement on the
part of a party hereto to any such extension or waiver will be valid only if set
forth in a written instrument signed on behalf of such party.
 
     Section 9.4 Notices.  All notices and other communications hereunder will
be in writing and will be deemed given if delivered personally, telecopied
(which is confirmed) or mailed by registered or certified mail (return receipt
requested) to the parties at the following addresses (or at such other address
for a party as is specified by like notice):
 
     (a) if to Parent or Sub, to
 
         The Williams Companies, Inc.
         One Williams Center
         Tulsa, Oklahoma 74172
         Attention: Chief Executive Officer
         Telecopy No.: (918) 588-2334
 
         with a copy to
 
         J. Furman Lewis
         Senior Vice President
           and General Counsel
         One Williams Center
         Tulsa, Oklahoma 74172
         Telecopy No.: (918) 588-2334
 
         and
 
                                       28
<PAGE>   36
 
         Randall H. Doud
         Skadden, Arps, Slate, Meagher & Flom
         919 Third Avenue
         New York, New York 10022
         Telecopy No.: (212) 735-2000
 
         and
 
     (b) if to the Company, to
 
         Transco Energy Company
         2800 Post Oak Boulevard, 21st Floor
         Houston, Texas 77056
         Attention: Chief Executive Officer
         Telecopy No.: (713) 439-4269
 
         with a copy to
 
         David E. Varner
         Transco Energy Company
         2800 Post Oak Boulevard
         Houston, Texas 77056
         Telecopy No: (713) 439-4269
 
         and
 
         Eric S. Robinson
         Wachtell, Lipton, Rosen & Katz
         51 West 52nd Street
         New York, New York 10019-6118
         Telecopy No.: (212) 403-2000
 
     Section 9.5 Interpretation.  When a reference is made in this Agreement to
Sections, such reference will be to a Section of this Agreement unless otherwise
indicated. The headings contained in this Agreement are for reference purposes
only and will not affect in any way the meaning or interpretation of this
Agreement. Whenever the words "include," "includes" or "including" are used in
this Agreement they will be deemed to be followed by the words "without
limitation." The phrases "the date of this Agreement," "the date hereof " and
terms of similar import, unless the context otherwise requires, will be deemed
to refer to December 12, 1994. References to "debt" in Sections 6.1(e) will not
include accrued expenses or trade payables.
 
     Section 9.6 Counterparts.  This Agreement may be executed in two or more
counterparts, all of which will be considered one and the same agreement and
will become effective when two or more counterparts have been signed by each of
the parties and delivered to the other parties, it being understood that all
parties need not sign the same counterpart.
 
     Section 9.7 Entire Agreement; No Third Party Beneficiaries.  This Agreement
(including the documents and the instruments referred to herein), the Stock
Option Agreement and the Confidentiality Agreement (a) constitute the entire
agreement and supersede all prior agreements and understandings, both written
and oral, among the parties with respect to the subject matter hereof and
thereof, and (b) other than Sections 3.2 and 6.10(d), are not intended to confer
upon any person other than the parties hereto and thereto any rights or remedies
hereunder or thereunder.
 
     Section 9.8 Governing Law.  This Agreement will be governed and construed
in accordance with the laws of the State of Delaware applicable to contracts
made, executed, delivered and performed wholly within the State of Delaware,
without regard to any applicable conflicts of law. The Company, Parent and
Subsidiary hereby (w) submit to the jurisdiction of any State and Federal courts
sitting in Delaware with respect to matters arising out of or relating hereto,
(x) agree that all claims with respect to such matters may be heard and
determined in an action or proceeding in such Delaware State or Federal court
and no other court,
 
                                       29
<PAGE>   37
 
(y) waive the defense of an inconvenient forum, and (z) agree that a final
judgment in any such action or proceeding will be conclusive and may be enforced
in other jurisdictions by suit on the judgment or in any other manner provided
by law.
 
     Section 9.9 Specific Performance.  The parties hereto agree that if any of
the provisions of this Agreement were not performed in accordance with their
specific terms or were otherwise breached, irreparable damage would occur, no
adequate remedy at law would exist and damages would be difficult to determine,
and that the parties will be entitled to specific performance of the terms
hereof, in addition to any other remedy at law or equity.
 
     Section 9.10 Publicity.  Except as otherwise required by law or the rules
of the NYSE, for so long as this Agreement is in effect, neither the Company nor
Parent will, or will permit any of its Subsidiaries to, issue or cause the
publication of any press release or other public announcement with respect to
the transactions contemplated by this Agreement without having consulted with
the other party.
 
     Section 9.11 Assignment.  Neither this Agreement nor any of the rights,
interests or obligations hereunder will be assigned by any of the parties hereto
(whether by operation of law or otherwise) without the prior written consent of
the other parties, except that Sub may assign, in its sole discretion, any or
all rights, interests and obligations hereunder to any direct or indirect wholly
owned Subsidiary of Parent incorporated under the laws of the State of Delaware.
Subject to the preceding sentence, this Agreement will be binding upon, inure to
the benefit of and be enforceable by the parties and their respective successors
and assigns.
 
     Section 9.12 Validity.  The invalidity or unenforceability of any provision
of this Agreement or the Stock Option Agreement will not affect the validity or
enforceability of any other provisions hereof or thereof, which will remain in
full force and effect.
 
     Section 9.13 Taxes.  Any liability arising out of the New York State Real
Property Gains Tax and any other tax imposed by any domestic or foreign taxing
authority with respect to the property of the Company due with respect to the
Offer or the Merger will be borne by Parent and expressly will not be a
liability of the stockholders of the Company.
 
                                       30
<PAGE>   38
 
     IN WITNESS WHEREOF, Parent, Sub and the Company have caused this Agreement
to be signed by their respective officers thereunto duly authorized as of the
date first written above.
 
                                          THE WILLIAMS COMPANIES, INC.
 
                                          By: /s/  KEITH E. BAILEY
                                            ------------------------------------
                                              Name: Keith E. Bailey
                                              Title: Chairman, President & Chief
                                                     Executive
                                                     Officer
 
                                          WC ACQUISITION CORP.
 
                                          By: /s/  J. FURMAN LEWIS
                                            ------------------------------------
                                              Name: J. Furman Lewis
                                              Title: Vice President, Assistant
                                                     Secretary and Assistant
                                                     Treasurer
 
                                          TRANSCO ENERGY COMPANY
 
                                          By: /s/  JOHN P. DESBARRES
                                            ------------------------------------
                                              Name: John P. DesBarres
                                              Title: Chairman of the Board,
                                                     President and Chief
                                                     Executive Officer
 
                                       31
<PAGE>   39
 
                                                                  EXHIBIT 3.1(c)
 
                      FORM OF CERTIFICATE OF DESIGNATION,
                             PREFERENCES AND RIGHTS
 
                                     OF THE
 
                             CUMULATIVE CONVERTIBLE
                         PREFERRED STOCK, $3.50 SERIES
                                 ($1 PAR VALUE)
 
                                       OF
 
                          THE WILLIAMS COMPANIES, INC.
 
                         ------------------------------
 
                         PURSUANT TO SECTION 151 OF THE
 
                GENERAL CORPORATION LAW OF THE STATE OF DELAWARE
 
                         ------------------------------
 
     The undersigned DOES HEREBY CERTIFY that the following resolution was duly
adopted on             , 1995, by the Board of Directors (the "Board") of The
Williams Companies, Inc., a Delaware corporation (hereinafter called the
"Corporation"), in accordance with the provisions of Section 151 of the General
Corporation Law of the State of Delaware:
 
          RESOLVED that pursuant to authority expressly granted to and vested in
     the Board by provisions of the Restated Certificate of Incorporation of the
     Corporation (the "Certificate of Incorporation"), the issuance of a series
     of Preferred Stock, par value $1 per share (the "Preferred Stock"), which
     shall consist of up to 2,500,000 of the        shares of Preferred Stock
     which the Corporation now has authority to issue, be, and the same hereby
     is, authorized, and the powers, designations, preferences and relative,
     participating, optional or other special rights, and the qualifications,
     limitations or restrictions thereof, of the shares of such series (in
     addition to the powers, designations, preferences and relative,
     participating, optional or other special rights, and the qualifications,
     limitations or restrictions thereof, set forth in the Certificate of
     Incorporation which may be applicable to the Preferred Stock) are fixed as
     follows:
 
     (i) The designation of such series of the Preferred Stock authorized by
this resolution shall be the $3.50 Cumulative Convertible Preferred Stock (the
"$3.50 Preferred Stock"). The total number of shares of the $3.50 Preferred
Stock shall be 2,500,000.
 
     (ii) Holders of shares of $3.50 Preferred Stock will be entitled to
receive, when and as declared by the Board out of assets of the Corporation
legally available for payment, an annual cash dividend of $3.50 per share,
payable in quarterly installments on February 1, May 1, August 1 and November 1,
commencing [the first such date following the Effective Time] (each a "dividend
payment date"). Dividends on the $3.50 Preferred Stock will be cumulative from
the date of initial issuance of shares of $3.50 Preferred Stock. Dividends will
be payable to holders of record as they appear on the stock books of the
Corporation on such record dates, not more than 60 days nor less than 10 days
preceding the payment dates thereof, as shall be fixed by the Board. When
dividends are not paid in full upon the $3.50 Preferred Stock and any other
Parity Preferred Stock (as defined in paragraph (ix)), all dividends declared
upon shares of Parity Preferred Stock will be declared pro rata so that in all
cases the amount of dividends declared per share on the $3.50 Preferred Stock
and such other Parity Preferred Stock shall bear to each other the same ratio
that accumulated and unpaid dividends per share on the shares of $3.50 Preferred
Stock and such other Parity Preferred Stock bear to each other. Except as set
forth in the preceding sentence, unless full cumulative dividends on the $3.50
Preferred Stock have been paid, no dividends (other than in Common Stock of the
Corporation) may be paid or declared and set aside for payment or other
distribution made upon the Common Stock or on any other
<PAGE>   40
 
stock of the Corporation ranking junior to or on a parity with the $3.50
Preferred Stock as to dividends, nor may any Common Stock or any other stock of
the Corporation ranking junior to or on a parity with the $3.50 Preferred Stock
as to dividends be redeemed, purchased or otherwise acquired for any
consideration (or any payment made to or available for a sinking fund for the
redemption of any shares of such stock; provided, however, that any moneys
theretofore deposited in any sinking fund with respect to any Preferred Stock of
the Corporation in compliance with the provisions of such sinking fund may
thereafter be applied to the purchase or redemption of such Preferred Stock in
accordance with the terms of such sinking fund regardless of whether at the time
of such application full cumulative dividends upon shares of the $3.50 Preferred
Stock outstanding to the last dividend payment date shall have been paid or
declared and set apart for payment) by the Corporation (except by conversion
into or exchange for stock of the Corporation ranking junior to the $3.50
Preferred Stock as to dividends). Dividends payable on the $3.50 Preferred Stock
for any period less than the full dividend period will be computed on the basis
of a 360-day year consisting of twelve 30-day months.
 
     (iii) The shares of $3.50 Preferred Stock shall rank prior to the shares of
Common Stock and of any other class of stock of the Corporation ranking junior
to the $3.50 Preferred Stock upon liquidation, so that in the event of any
liquidation, dissolution or winding up of the Corporation, whether voluntary or
involuntary, the holders of the $3.50 Preferred Stock shall be entitled to
receive out of the assets of the Corporation available for distribution to its
stockholders, whether from capital, surplus or earnings, before any distribution
is made to holders of shares of Common Stock or any other such junior stock, an
amount equal to $50 per share (the "Liquidation Preference" of a share of $3.50
Preferred Stock) plus an amount equal to all dividends (whether or not earned or
declared) accumulated and unpaid on the shares of $3.50 Preferred Stock to the
date of final distribution. After payment of the full amount of the Liquidation
Preference and such dividends, the holders of shares of $3.50 Preferred Stock
will not be entitled to any further participation in any distribution of assets
by the Corporation. If, upon any liquidation, dissolution or winding up of the
Corporation, the assets of the Corporation, or proceeds thereof, distributable
among the holders of shares of Parity Preferred Stock shall be insufficient to
pay in full the preferential amount aforesaid, then such assets, or the proceeds
thereof, shall be distributable among such holders ratably in accordance with
the respective amounts which would be payable on such shares if all amounts
payable thereon were payable in full. For the purposes hereof, neither a
consolidation or merger of the Corporation with or into any other corporation,
nor a merger of any other corporation with or into the Corporation, nor a sale
or transfer of all or any part of the Corporation's assets for cash or
securities shall be considered a liquidation, dissolution or winding up of the
Corporation.
 
     (iv) The shares of the $3.50 Preferred Stock will not be redeemable prior
to November 1, 1999. On and after November 1, 1999, the $3.50 Preferred Stock
will be redeemable, in whole at any time or from time to time in part at the
option of the Corporation, upon not less than 30 nor more than 60 days' notice,
at the following redemption prices (the "Redemption Prices") per share if
redeemed during the twelve-month period beginning November 1 of the year
indicated below; plus, in each case, all dividends accrued and unpaid on the
$3.50 Preferred Stock up to the date fixed for redemption:
 
<TABLE>
<CAPTION>
                                                                            REDEMPTION
                                                                              PRICE
               YEAR                                                         PER SHARE
               ----                                                         ----------
        <S>                                                                 <C>
        1999..............................................................   $ 51.40
        2000..............................................................     51.05
        2001..............................................................     50.70
        2002..............................................................     50.35
        2003 and thereafter...............................................     50.00
</TABLE>
 
     In the event that the Corporation determines to redeem fewer than all of
the outstanding shares of the $3.50 Preferred Stock, the shares to be redeemed
shall be determined by lot or a substantially equivalent method.
 
     If a notice of redemption has been given pursuant to this paragraph (iv)
and if, on or before the date fixed for redemption, the funds necessary for such
redemption shall have been set aside by the Corporation, separate
 
                                        2
<PAGE>   41
 
and apart from its other funds, in trust for the pro rata benefit of the holders
of the shares so called for redemption, then, notwithstanding that any
certificates for such shares have not been surrendered for cancellation, on the
redemption date dividends shall cease to accrue on the shares of $3.50 Preferred
Stock to be redeemed, and at the close of business on the redemption date the
holders of such shares shall cease to be stockholders with respect to such
shares and shall have no interest in or claims against the Corporation by virtue
thereof and shall have no voting or other rights with respect to such shares,
except the right to receive the moneys payable upon such redemption, without
interest thereon, upon surrender (and endorsement, if required by the
Corporation) of their certificates, and the shares evidenced thereby shall no
longer be outstanding. Subject to applicable escheat laws, any moneys so set
aside by the Corporation and unclaimed at the end of two years from the
redemption date shall revert to the general funds of the Corporation, after
which reversion the holders of such shares so called for redemption shall look
only to the general funds of the Corporation for the payment of the amounts
payable upon such redemption. Any interest accrued on funds so deposited shall
be paid to the Corporation from time to time.
 
     (v) The holders of shares of $3.50 Preferred Stock shall have no voting
rights whatsoever, except for any voting rights to which they may be entitled
under the laws of the State of Delaware, and except as follows:
 
          (I) If and whenever at any time or times dividends payable on the
     $3.50 Preferred Stock or on any other Preferred Stock shall have been in
     arrears and unpaid in an aggregate amount equal to or exceeding the amount
     of dividends payable thereon for six quarterly periods, then the holders of
     the Preferred Stock shall have, in addition to the other voting rights set
     forth herein, the exclusive right, voting separately as a class, to elect
     two directors of the Corporation, such directors to be in addition to the
     number of directors constituting the Board immediately prior to the accrual
     of such right, the remaining directors to be elected by the other class or
     classes of stock entitled to vote therefor at each meeting of stockholders
     held for the purpose of electing directors. Such voting right shall
     continue until such time as all cumulative dividends accumulated on all the
     Preferred Stock having cumulative dividends shall have been paid in full
     and until any noncumulative dividends payable on all the Preferred Stock
     having noncumulative dividends shall have been paid regularly for at least
     one year, at which time such voting right of the holders of the Preferred
     Stock shall terminate, subject to revesting at such time as there shall
     occur each and every subsequent event of default of the character indicated
     above.
 
          Whenever such voting right shall have vested, such right may be
     exercised initially either at a special meeting of the holders of the
     Preferred Stock, called as hereinafter provided, or at any annual meeting
     of stockholders held for the purpose of electing directors, and thereafter
     at each successive annual meeting.
 
          At such time when such voting right shall have vested in the holders
     of the Preferred Stock, and if such right shall not already have been
     initially exercised, a proper officer of the Corporation shall, upon the
     written request of the holders of record of 10 percent in number of shares
     of the Preferred Stock then outstanding, addressed to the Secretary of the
     Corporation, call a special meeting of the holders of the Preferred Stock
     and of any other class or classes of stock having voting power with respect
     thereto for the purpose of electing directors. Such meeting shall be held
     at the earliest practicable date upon the notice required for annual
     meetings of stockholders at the place for holding of annual meetings of
     stockholders of the Corporation, or, if none, at a place designated by the
     Secretary of the Corporation. If such meeting shall not be called by the
     proper officers of the Corporation within 30 days after the personal
     service of such written request upon the Secretary of the Corporation, or
     within 30 days after mailing the same within the United States of America,
     by registered mail, addressed to the Secretary of the Corporation at its
     principal office (such mailing to be evidenced by the registry receipt
     issued by the postal authorities), then the holders of record of 10 percent
     in number of shares of the Preferred Stock then outstanding may designate
     in writing one of their number to call such meeting at the expense of the
     Corporation, and such meeting may be called by such person so designated
     upon the notice required for annual meetings of stockholders and shall be
     held at the same place as is elsewhere provided for in this subparagraph
     (I). Any holder of the Preferred Stock shall have access to the stock books
     of the Corporation for the purpose of causing a meeting of stockholders to
     be called pursuant to the provisions of this paragraph. Notwithstanding the
     provisions of this paragraph, however, no such special meeting shall be
     called during a period within 90 days immediately preceding the date fixed
     for the next annual meeting of stockholders.
 
                                        3
<PAGE>   42
 
          At any meeting held for the purpose of electing directors at which the
     holders of the Preferred Stock shall have the right to elect directors as
     provided herein, the presence in person or by proxy of the holders of
     33 1/3 percent of the then outstanding shares of the Preferred Stock shall
     be required and be sufficient to constitute a quorum of the Preferred Stock
     for the election of directors by the Preferred Stock. At any such meeting
     or adjournment thereof (A) the absence of a quorum of the holders of the
     Preferred Stock shall not prevent the election of directors other than
     those to be elected by the holders of the Preferred Stock and the absence
     of a quorum or quorums of the holders of other classes of capital stock
     entitled to elect such other directors shall not prevent the election of
     directors to be elected by the holders of the Preferred Stock and (B) in
     the absence of a quorum of the holders of any class of stock entitled to
     vote for the election of directors, a majority of the holders present in
     person or by proxy of such class shall have the power to adjourn the
     meeting for the election of directors which the holders of such class are
     entitled to elect, from time to time, without notice other than
     announcement at the meeting, until a quorum shall be present.
 
          The directors elected pursuant to this subparagraph (I) shall serve
     until the next annual meeting or until their respective successors shall be
     elected and shall qualify; provided, however, that when the right of the
     holders of the Preferred Stock to elect directors as herein provided shall
     terminate, the terms of office of all persons so elected by the holders of
     the Preferred Stock shall terminate, and the number of directors of the
     Corporation shall thereupon be such number as may be provided in the
     By-laws of the Corporation irrespective of any increase made pursuant to
     this subparagraph (I).
 
          So long as any shares of $3.50 Preferred Stock are outstanding, the
     By-laws of the Corporation shall contain provisions ensuring that the
     number of directors of the Corporation shall at all times be such that the
     exercise, by the holders of shares of $3.50 Preferred Stock and the holders
     of other Preferred Stock, of the right to elect directors under the
     circumstances provided in this subparagraph (I) will not contravene any
     provisions of the Corporation's Certificate of Incorporation or By-laws.
 
          (II) So long as any shares of the $3.50 Preferred Stock remain
     outstanding, the Corporation will not, either directly or indirectly or
     through merger or consolidation with any other corporation, without the
     affirmative vote at a meeting or the written consent with or without a
     meeting of the holders of at least 66 2/3 percent in number of shares of
     the $3.50 Preferred Stock then outstanding, (A) create any class or classes
     of stock ranking prior to or on a parity with the $3.50 Preferred Stock
     either as to dividends or upon liquidation or increase the authorized
     number of shares of any class or classes of stock ranking prior to or on a
     parity with the $3.50 Preferred Stock either as to dividends or upon
     liquidation, or create or authorize any obligation or security convertible
     into shares of stock of any class ranking prior to or on a parity with the
     Preferred Stock either as to dividends or upon liquidation, but may,
     without such consent, create or authorize obligations or securities
     convertible into shares of Preferred Stock, or (B) amend, alter or repeal
     any of the provisions of the Certificate of Incorporation (including this
     resolution) so as to affect adversely the preferences, special rights or
     powers of the $3.50 Preferred Stock or of the holders thereof.
 
     (vi) Except as provided in paragraph (v)(II), no consent of the holders of
the $3.50 Preferred Stock shall be required for (a) the creation of any
indebtedness of any kind of the Corporation, (b) the creation, or increase or
decrease in the amount, of any class or series of stock of the Corporation not
ranking prior to or on a parity with to the $3.50 Preferred Stock as to
dividends or upon liquidation or (c) any increase or decrease in the amount of
authorized Common Stock or any increase, decrease or change in the par value
thereof or in any other terms thereof.
 
     (vii) Subject to the provisions of paragraph (iv) hereof, the Board
reserves the right by subsequent amendment of this resolution from time to time
to increase or decrease the number of shares which constitute the $3.50
Preferred Stock (but not below the number of shares thereof then outstanding)
and in other respects to amend this resolution within the limitations provided
by law, this resolution and the Certificate of Incorporation.
 
     (viii) At the option of the holder thereof and upon surrender thereof for
conversion to the Corporation at the office of the Transfer Agent of the
Corporation's Common Stock in the Borough of Manhattan, the City of
 
                                        4
<PAGE>   43
 
New York or in the City of Tulsa, each share of $3.50 Preferred Stock will be
convertible (or if such share is called or surrendered for redemption, then in
respect of such share to and including, but not after, the redemption date) into
fully paid and nonassessable shares of Common Stock at the initial conversion
rate of 1.5625 shares of Common Stock for each share of $3.50 Preferred Stock,
the conversion rate being subject to adjustment as hereinafter provided:
 
          (I) In case the Corporation shall (A) pay a dividend in shares of its
     capital stock, (B) subdivide its outstanding shares of Common Stock into a
     greater number of shares, (C) combine its outstanding shares of Common
     Stock into a smaller number of shares, or (D) issue by reclassification of
     its shares of Common Stock any shares of its capital stock, the conversion
     rate in effect immediately prior thereto shall be adjusted so that the
     holder of a share of $3.50 Preferred Stock surrendered for conversion after
     the record date fixing stockholders to be affected by such event shall be
     entitled to receive upon conversion the number of such shares of Common
     Stock which he would have been entitled to receive after the happening of
     such event had such share of $3.50 Preferred Stock been converted
     immediately prior to such record date. Such adjustment shall be made
     whenever any of such events shall happen, but shall also be effective
     retroactively as to shares of $3.50 Preferred Stock converted between such
     record date and the date of the happening of any such event.
 
          (II) In case the Corporation shall issue rights or warrants to all
     holders of its Common Stock entitling them to subscribe for or purchase
     shares of Common Stock at a price per share less than the Current Market
     Price Per Share (as defined in subparagraph (IV) below) of Common Stock at
     the record date mentioned below, the number of shares of Common Stock into
     which each share of $3.50 Preferred Stock shall thereafter be convertible
     shall be determined by multiplying the number of shares of Common Stock
     into which such share of $3.50 Preferred Stock was theretofore convertible
     by a fraction, the numerator of which shall be the number of shares of
     Common Stock outstanding on the date of issuance of such rights or warrants
     plus the number of additional shares of Common Stock offered for
     subscription or purchase, and the denominator of which shall be the number
     of the shares of Common Stock outstanding on the date of issuance of such
     rights or warrants plus the number of shares which the aggregate offering
     price of the total number of shares so offered would purchase at such
     Current Market Price Per Share. Such adjustment shall be made whenever such
     rights or warrants are issued, but shall also be effected retroactively as
     to shares of $3.50 Preferred Stock converted between the record date for
     the determination of stockholders entitled to receive such rights or
     warrants and the date such rights or warrants are issued.
 
          (III) In case the Corporation shall distribute to all holders of its
     Common Stock evidences of its indebtedness or assets (excluding any cash
     dividend or distribution made out of current or retained earnings) or
     rights to subscribe other than as set forth in subparagraph (II) above,
     then in each such case the number of shares of Common Stock into which each
     share of $3.50 Preferred Stock shall thereafter be convertible shall be
     determined by multiplying the number of shares of Common Stock into which
     such share was theretofore convertible by a fraction, the numerator of
     which shall be the Current Market Price Per Share of the Common Stock on
     the record date fixed by the Board for such distribution, and the
     denominator of which shall be such Current Market Price Per Share of the
     Common Stock less the then fair market value (as determined by the Board,
     whose determination shall be conclusive) of the portion of the assets,
     evidences of indebtedness or subscription rights so distributed applicable
     to one share of the Common Stock. Such adjustment shall be made whenever
     any such distribution is made, but shall also be effective retroactively as
     to shares of $3.50 Preferred Stock converted between the record date for
     the determination of stockholders entitled to receive such distribution and
     the date such distribution is made.
 
          (IV) For the purpose of any computation under subparagraphs (II) and
     (III) above and (VI) below, the "Current Market Price Per Share" of Common
     Stock at any date shall be deemed to be the average of the daily closing
     prices for the 15 consecutive trading days commencing 20 trading days
     before the day in question. The closing price for each day shall be
     reported on the New York Stock Exchange-Composite Transactions Tape or as
     reported by any successor central market system.
 
                                        5
<PAGE>   44
 
          (V) No adjustment in the conversion rate shall be required unless such
     adjustment would require an increase or decrease of at least 1% in such
     rate; provided, however, that any adjustments which by reason of this
     subparagraph (V) are not required to be made shall be carried forward and
     taken into account in any subsequent adjustment. All calculations under
     this paragraph (viii) shall be made to the nearest one-hundredth of a
     share.
 
          (VI) No fractional shares or scrip representing fractional shares of
     Common Stock shall be issued upon the conversion of any share of $3.50
     Preferred Stock. If the conversion thereof results in a fraction, an amount
     equal to such fraction multiplied by the Current Market Price Per Share of
     Common Stock (as defined in subparagraph (IV) above) as of the conversion
     date shall be paid to such holder in cash by the Corporation.
 
          (VII) In case the Corporation shall enter into any consolidation,
     merger or other transaction in which the shares of Common Stock are
     exchanged for or changed into other stock or securities, cash and/or any
     other property, then in each such case each share of $3.50 Preferred Stock
     remaining outstanding at the time of consummation of such transaction shall
     thereafter be convertible into the kind and amount of such stock or
     securities, cash and/or other property receivable upon consummation of such
     transaction by a holder of the number of shares of Common Stock into which
     such shares of $3.50 Preferred Stock might have been converted immediately
     prior to consummation of such transaction, assuming in each case that such
     holder of Common Stock failed to exercise rights of election, if any, as to
     the kind or amount of securities, cash or other property receivable upon
     consummation of such transaction (provided that if the kind or amount of
     securities, cash or other property receivable upon consummation of such
     transaction is not the same for each non-electing share, then the kind and
     amount of securities, cash or other property receivable upon consummation
     of such transaction for each non-electing share shall be deemed to be the
     kind and amount as receivable per share by a plurality of the non-electing
     shares).
 
          (VIII) In the event of any Change in Control (as hereinafter defined)
     of the Corporation, each holder of $3.50 Preferred Stock shall have the
     right, at the holder's option, to require the Corporation to redeem all or
     any number of such holder's shares of $3.50 Preferred Stock during the
     period (the "Exercise Period") beginning on the 30th day and ending on the
     90th day after the date of such Change in Control at the Redemption Price,
     plus accrued and unpaid dividends to the date fixed for redemption;
     provided, however, that such redemption right shall not be applicable in
     the case of any Change in Control of the Corporation which shall have been
     duly approved by the Continuing Directors (as hereinafter defined) during
     the period (the "Approval Period") prior to or within 21 days after the
     date on which such Change in Control shall have occurred. As used herein,
     (a) "Acquiring Person" means any Person who is or becomes the Beneficial
     Owner, directly or indirectly, of 10% or more of the outstanding Common
     Stock, (b) "Beneficial Owner" has the meaning ascribed to such term in Rule
     13d-3 adopted pursuant to the Securities Exchange Act of 1934, as amended,
     (c) a "Change in Control" of the Corporation shall be deemed to have
     occurred at such time as (i) any Person is or becomes the Beneficial Owner,
     directly or indirectly, of 30% or more of the outstanding Common Stock or
     (ii) individuals who constitute the Continuing Directors cease for any
     reason to constitute at least a majority of the Board, (d) "Continuing
     Director" means any member of the Board who is not affiliated with an
     Acquiring Person and who was a member of the Board immediately prior to the
     time that the Acquiring Person became an Acquiring Person and any successor
     to a Continuing Director who is not affiliated with the Acquiring Person
     and is recommended to succeed a Continuing Director by a majority of
     Continuing Directors who are then members of the Board, and (e) "Person"
     means any individual, corporation, partnership, limited partnership,
     association, joint-stock company, trust, unincorporated organization,
     syndicate or group (as such terms are used in Section 13d-3 adopted
     pursuant to the Securities Exchange Act of 1934, as amended) or government
     or political subdivision thereof.
 
          On or before the seventh day after the termination of the Approval
     Period, the Corporation shall mail to all holders of record of the $3.50
     Preferred Stock as of the last day of the Approval Period, at their
     respective addresses as the same shall appear on the books of the
     Corporation as of such date, a notice disclosing (i) the Change in Control,
     (ii) whether or not the Continuing Directors have approved the
 
                                        6
<PAGE>   45
 
     Change in Control, and (iii) if the Continuing Directors have not approved
     the Change in Control, the respective dates on which the Exercise Period
     commences and ends, the redemption price per share of the $3.50 Preferred
     Stock applicable hereunder and the procedure which the holder must follow
     to exercise the redemption right provided above. The Corporation shall
     cause a copy of such notice to be published in a newspaper of general
     circulation in the Borough of Manhattan, New York. To exercise such
     redemption right, a holder of the $3.50 Preferred Stock must deliver during
     the Exercise Period written notice to the Corporation (or an agent
     designated by the Corporation for such purpose) of the holder's exercise of
     such redemption right, and, to be valid, any such notice of exercise must
     be accompanied by each certificate evidencing shares of the $3.50 Preferred
     Stock with respect to which the redemption right is being exercised, duly
     endorsed for transfer. On or prior to the seventh day after the close of
     the Exercise Period, the Corporation shall accept for payment all shares of
     $3.50 Preferred Stock properly surrendered to the Corporation (or an agent
     designated by the Corporation for such purpose) during the Exercise Period
     for redemption in connection with the valid exercise of such redemption
     right and shall cause payment to be made in cash for such shares of $3.50
     Preferred Stock.
 
     (ix) For the purposes of this resolution, any stock of any class or classes
of the Corporation shall be deemed to rank:
 
          (a) prior to shares of the $3.50 Preferred Stock, either as to
     dividends or upon liquidation, if the holders of stock of such class or
     classes shall be entitled by the terms thereof to the receipt of dividends
     or of amounts distributable upon liquidation, dissolution or winding up, as
     the case may be, in preference or priority to the holders of shares of the
     $3.50 Preferred Stock;
 
          (b) on a parity with shares of the $3.50 Preferred Stock, either as to
     dividends or upon liquidation, whether or not the dividend rates, dividend
     payment dates or redemption or liquidation prices per share thereof be
     different from those of the $3.50 Preferred Stock, if the holders of stock
     of such class or classes shall be entitled by the terms thereof to the
     receipt of dividends or of amounts distributable upon liquidation,
     dissolution or winding up, as the case may be, in proportion to their
     respective dividend rates or liquidation prices, without preference or
     priority of one over the other as between the holders of such stock and the
     holders of shares of $3.50 Preferred Stock (the term "Parity Preferred
     Stock" being used to refer to any stock on a parity with the shares of
     $3.50 Preferred Stock, either as to dividends or upon liquidation as the
     context may require); and
 
          (c) junior to shares of the $3.50 Preferred Stock, either as to
     dividends or upon liquidation, if such class shall be Common Stock or if
     the holders of the $3.50 Preferred Stock shall be entitled to the receipt
     of dividends or of amounts distributable upon liquidation, dissolution or
     winding up, as the case may be, in preference or priority to the holders of
     stock of such class or classes.
 
     (x) The $3.50 Preferred Stock shall rank on a parity with the $2.21
Cumulative Preferred Stock, par value $1 per share, of the Corporation as to
dividends and upon liquidation. The $3.50 Preferred Stock shall rank prior to
the Series A Junior Participating Preferred Stock, par value $1 per share, and
all other shares of capital stock of the Corporation outstanding at the time of
issuance of the $3.50 Preferred Stock.
 
                                        7
<PAGE>   46
 
     IN WITNESS WHEREOF, The Williams Companies, Inc. has caused this
Certificate to be made under the seal of the Corporation and signed by
               ,                , and attested by                ,
               , this       day of           , 1995.
 
                                          THE WILLIAMS COMPANIES, INC.
 
[SEAL]
 
Attest:                                   By:  
                                              ----------------------------------
 
- ----------------------------------------
 
                                        8


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