Document:

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                                                                   EXHIBIT 10.14

                  [Letterhead of PetroChemNet Holdings, Inc.]

September 30, 1999

Computer Sciences Corporation
266 Second Avenue
Waltham, MA 02451

Gentlemen:

     This letter will evidence our mutual understanding with respect to the
strategic alliance (the "Strategic Alliance") between PetroChemNet Holdings,
Inc., a Delaware corporation ("PCN") and Computer Sciences Corporation, a
Nevada corporation ("CSC").

1.   Initial Purchase of PCN Stock.

     (a)  CSC or one of its subsidiaries will purchase, for an aggregate of $1
          million cash, a number of shares of common stock of PCN which as of
          the date of this letter represents 1.25% of the fully diluted
          outstanding common stock of PCN at a price based on the fully diluted
          common stock of PCN having an aggregate value of $80 million.

     (b)  CSC's investment must be approved by PCN's Board; the Board is
          expected to consider the investment prior to October 6, 1999. PCN will
          provide CSC with written notification of PCN's Board approval.

2.   Commissions for New PCN Business.

     (a)  CSC and PCN have agreed upon a list of prospective PCN customers with
          whom CSC has a relationship and to whom CSC will be authorized to
          market PCN services (the "Listed Prospects"). The list is attached
          hereto and as may be amended by mutual consent.

     (b)  This list will be updated from time to time by mutual agreement, and
          Listed Prospects that are not actively being pursued by CSC within 3
          months of being added to the list will be removed from the list.

     (c)  PCN may either pursue the Listed Prospects in conjunction with CSC or
          individually without CSC, but PCN will provide notice and coordination
          of its activities in pursuit of the Listed Prospects on at least a
          monthly basis.

     (d)  CSC will receive commissions on a monthly basis, equal to 20% of the
          cash realized (commissions from trading activities) by PCN from sales
          of its services to Listed Prospects
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         for the preceding month during the 3-year period following the initial
         sale, unless earlier terminated in accordance with paragraphs 5 or 8
         below.

3.   CSC Consulting Services.

     (a) CSC will have the right of first negotiation, but not the obligation,
         to provide consulting services required by PCN in certain specified
         areas, including strategic consulting, marketing, new product
         development, system development management, international, logistics,
         letters of credit and credit enhancement.

     (b) These services will be provided at competitive rates and are subject
         to negotiation of mutually agreeable definitive agreements.

4.   Additional Opportunities.

     (a) CSC and PCN may enter into mutually agreeable additional arrangements
         with respect to co-branded, co-marketed or cross-sold services.

5.   Payments.

     (a) Commissions payable under paragraph 2 above shall be paid in common
         stock of PCN, valued based on the most recent transaction value or
         appraisal until there is a market price established after PCN's initial
         public offering, after which time the price of the common stock will be
         the closing sales price of the common stock at the end of the month in
         which the commissions are earned. No further commissions will be
         payable under paragraph 2 above after CSC is issued $5 million in
         aggregate value of common stock under paragraphs 2, 3 or 4 herein. PCN
         and CSC will renegotiate and extend a mutually agreeable commission
         structure beyond this $5 million aggregate cap by mutual consent and
         amendment to this agreement to reflect CSC's ongoing contributions.

     (b) On a project-by project basis, PCN may, but shall not be obligated to,
         offer CSC the right to receive up to 50% of CSC's consulting fees under
         paragraph 3 above in the form of PCN common stock, and CSC shall not be
         obligated to accept any such stock in lieu of cash. The consulting fees
         will be payable upon the completion of the consulting services in
         accordance with the definitive agreements, and the common stock will be
         valued based on the most recent transaction value or appraisal, except,
         if PCN is a public company at the date of the contract execution of the
         consulting services, the value will be based on the average of the
         closing sales prices of the common stock for the 10 trading days
         immediately preceding the date of contract execution of the consulting
         services, unless agreed otherwise in advance.

     (c) Amounts payable under paragraph 4 above shall be set forth in the
         definitive agreements and may be in the form of common stock of PCN
         valued as set forth in such definitive agreements.

6.   Preferred Provider.

     (a)  During the term of the Strategic Alliance:

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          (i)  CSC will be the preferred IT systems integrator with whom PCN
               partners, or enters into arrangements for co-branded, co-marketed
               or cross-sold services so long as CSC's rates are competitive and
               its technology and performance are reasonably acceptable to PCN;

          (ii) PCN will be CSC's and its affiliates preferred platform and
               exchange for independent market trading of commodity products
               traded over PCN's system (including initially chemicals, polymers
               and refined oil products) with respect to PCN's direct
               competitors that are set forth from time to time in writing by
               PCN to CSC in whom CSC makes an investment, or with whom CSC
               partners, or enters into arrangements for co-branded, co-marketed
               or cross-sold services. If CSC proposes to make an investment in
               or a strategic alliance for co-branded, co-marketed or cross-sold
               services or otherwise with any competitor of PCN, CSC shall give
               PCN 30 days' prior written notice. If PCN wishes to enter into
               new lines of business in addition to trading of chemicals,
               polymers and refined oil products and wishes to define additional
               direct competitors in which CSC would not make an investment, or
               with whom CSC would not partner, or enter into arrangements for
               co-branded, co-marketed or cross-sold services, then PCN shall
               give CSC 30 days' prior written notice and amend this agreement
               by mutual consent. PCN initially designates such competitors to
               include (but not be limited to) ChemConnect, Commercex and I-2-I,
               e-chemicals, fob.com, Verticalnet, efuel.com, and their
               affiliates that are engaged in directly competing business.

     (b)  CSC and its affiliates will not compete with PCN during the term of
          the Strategic Alliance and for a period of one year after the
          termination of the Strategic Alliance.

7.   Meetings.

     (a)  Carl D. McCutcheon and a senior representative of CSC, who shall
          initially be Chris Davis, shall meet no less than once each calendar
          quarter to discuss opportunities and methods to improve the Strategic
          Alliance.

8.   Term.

     (a)  Either CSC or PCN may terminate the Strategic Alliance at any time
          upon 30 days' prior written notice.

     (b)  Upon termination of the Strategic Alliance:

          (i)  If PCN has not completed its initial public offering, PCN will
               have the option to repurchase all PCN common stock held by CSC at
               a price equal to the appraised value of such shares determined by
               the average of two independent appraisers, one selected by PCN,
               the second selected by CSC, (unless by mutual agreement it is
               determined that a second appraisal is not necessary). The
               appraisal costs shall be shared equally by PCN and CSC;

          (ii) If PCN has completed its initial public offering, PCN shall have
               the option to repurchase all PCN common stock held by CSC at a
               price equal to the average closing price of the common stock for
               the 10 trading days immediately preceding the date of repurchase.
               If PCN chooses not to repurchase the shares of common stock of
               PCN held

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                by CSC, CSC shall sell not more that 25% of the shares of PCN
                held by it in any subsequent calendar quarter, subject to any
                restrictions imposed by underwriters or securities laws;

          (iii) PCN will continue to pay commissions to CSC pursuant paragraph 2
                above, subject to the limitation in paragraph 5 above, if PCN
                terminates the Strategic Alliance. If CSC terminates the
                Strategic Alliance, PCN will pay commissions to CSC pursuant to
                paragraph 2 above, subject to the limitations in paragraph 5
                above, only for a period of six months after the date of
                termination. Upon termination of the Strategic Alliance, CSC
                will no longer be authorized as a PCN sales channel under
                paragraph 2 above;

          (iv)  CSC will complete any consulting project for PCN previously
                commenced pursuant to paragraph 3 above;

          (v)   CSC and PCN will terminate on an orderly basis all arrangements
                entered into pursuant to paragraph 4 above; and

          (vi)  The provisions of paragraphs 6 (other than paragraph 6(b) which
                shall remain in effect in accordance with its terms) and 7 above
                will cease to apply to CSC and PCN.

9.   Miscellaneous.

     (a)  The Strategic Alliance, this letter and all documentations
          contemplated by this letter shall be governed by the internal law of
          the State of Texas, without regard to any conflict of laws principles.

     (b)  Each of PCN and CSC will bear its own costs and expenses of the
          preparation of the documentation and performance of the obligations
          set forth in this letter.

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     If this letter correctly sets forth our understanding, please indicate your
acceptance by executing this letter in the space provided below.

This letter agreement shall be effective as of September 30, 1999. CSC agrees
to wire transfer the funds to PCN's designated account to purchase the stock
within 5 business days after notification by PCN of its Board of Directors
approval of this transaction.

                                   Very truly yours,

                                   PETROCHEMNET HOLDINGS, INC.

                                   By /s/ CARL D. McCUTCHEON
                                      -------------------------------------
                                      Carl D. McCutcheon
                                      President and Chief Executive Officer

ACCEPTED AND AGREED TO
THIS 30th day of September, 1999

COMPUTER SCIENCES CORPORATION

By /s/ PAUL T. TUCKER
   ------------------------------
   Paul T. Tucker
   Vice President

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                                                                   EXHIBIT 10.15

                  [Letterhead of PetroChemNet Holdings, Inc.]

November 11, 1999

E.I. du Pont de Nemours and Company
1007 Market Street
Wilmington, DE 19898

Gentlemen:

         This letter will evidence our mutual understanding and agreement with
respect to the strategic alliance (the "Strategic Alliance") between
PetroChemNet Holdings, Inc., a Delaware corporation ("PCN, CheMatch, or the
Company") and E. I. du Pont de Nemours and Company, a Delaware corporation
("DuPont").

1.       DuPont Purchase of PCN Preferred Stock.

         (a)  DuPont will purchase for cash $7 million of PCN Series C Preferred
              Stock at the same price and subject to the same terms and
              conditions as the other purchasers of the Series C Preferred Stock
              at the closing of the Series C Preferred Stock financing ("the
              Series C Preferred Stock Financing"). The target closing date for
              the Series C Preferred Stock Financing is November 18, 1999.

2        DuPont Purchase of PCN Common Stock

         (a)  DuPont shall, simultaneous with the closing of the Series C
              Preferred Stock Financing, purchase a number of shares of PCN
              Common Stock equal to $5,000,000, divided by the price per share
              paid for the Series C Preferred Stock. The consideration for the
              purchase of the Common Stock shall consist of $.01 per share cash,
              and other good and valuable consideration including goods and
              services as further described herein.

         (b)  DuPont will work with PCN to add those potential customers agreed
              by the parties to the customers using the CheMatch platform of PCN
              for trading products. For each such customer up to a maximum of 20
              customers, that completes at least five (5) traces prior to
              December 31, 2000, with third parties other than DuPont on the
              CheMatch platform at the standard rates charged for the use of the
              CheMatch platform, DuPont shall earn a commission of $100,000. In
              lieu of a cash payment, DuPont will use such commission to
              purchase a number of shares of Common Stock of PCN equal to such
              $100,000, divided by the Fair Market Value per share of Common
              Stock. For the purposes of this paragraph 2(b), "Fair Market
              Value" shall mean (i) the price per share paid for the Series C
              Preferred Stock until the date 120 days from 1 December 1999, or
              (ii) thereafter, the per share price based on the most recent
              transaction value or appraisal, if PCN has not completed its
              initial public offering, or if PCN has completed its initial
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         public offering, the closing price of PCN's Common Stock on the date of
         the fifth trade that meets the condition set forth above.

    (c)  DuPont shall have the right to purchase, prior to the closing of the
         initial public offering of Common Stock of PCN registered under the
         Securities Act of 1933, as amended, additional shares of PCN Common
         Stock, so that after such purchase DuPont would own 10% of the "fully
         diluted" Common Stock of PCN. In determining "fully diluted" Common
         Stock, all outstanding consultant, employee and director stock options
         shall be assumed to be exercised, all warrants shall be assumed to be
         exercised at a net amount using the Fair Market Value of the Common
         Stock, and all Preferred Stock shall be assumed to be converted at the
         conversion price in effect at that time. For the purposes of this
         paragraph 2(c), "Fair Market Value" shall mean the per shares price to
         public in the initial public offering of Common Stock in the event that
         DuPont shall exercise its right to purchase such additional shares in
         connection with the initial public offering of Common Stock of PCN, or
         the per share price based on the most recent transaction value or
         appraisal if such purchase is not in connection with the initial public
         offering. For the purposes of this paragraph 2(c), DuPont shall be
         deemed to have exercised its right hereunder in connection with the
         initial public offering of Common Stock of PCN, if prior to any written
         notice to PCN by DuPont that it is exercising its right to purchase
         additional shares of Common Stock under this paragraph 2(c), PCN
         notifies DuPont in writing that it is contemplating filing a
         registration statement with the Securities and Exchange Commission for
         an initial public offering of its Common Stock within the following 60
         days. DuPont shall have 15 days after receipt of such notice to
         exercise its right to purchase under this paragraph 2(c) by sending
         written notice to PCN of such exercise. If DuPont fails to send such
         notice to PCN within the time set forth above, DuPont shall be deemed
         to have waived its right to purchase any additional shares of Common
         Stock of PCN in the event that the contemplated initial public offering
         of Common Stock of PCN is completed. If DuPont exercises its right to
         purchase such additional shares of Common Stock, the closing of such
         purchase shall occur at the same time as the closing of the initial
         public offering. DuPont shall have the right to purchase additional
         shares of Common Stock under this paragraph 2(c) only once, and after
         such initial purchase, its rights under this paragraph 2(c) shall
         terminate. Further provided that, in the event DuPont has exercised the
         share purchase option outlined in this paragraph 2(c), the provisions
         of paragraph 2(b) above shall not operate to allow DuPont to increase
         its ownership in excess of the 10% of "fully diluted" Common Stock of
         PCN specified above in this paragraph 2(c).

3.   DuPont's Obligations and Agreements.

    (a)  For the purposes of this paragraph 3, "Products" shall mean bulk
         chemicals, bulk polymers and refined oil products available for trade
         over the CheMatch system

    (b)  DuPont shall: (1) for a period of one year from the closing of the
         transactions contemplated by this letter agreement use the CheMatch
         platform of PCN at the standard rates charged for the use of the
         CheMatch platform exclusively for Products that it buys using
         e-commerce; (2) use reasonable efforts to use the

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          CheMatch platform of PCN at the standard rates charged for the use of
          the CheMatch platform for any Products that it trades; (3) for the
          four year period commencing 1 January 2001, use reasonable efforts to
          trade at the standard rates charged for the use of the CheMatch
          platform an increasing amount of spot purchases of Products provided
          that for the relevant Product CheMatch continues to serve as the
          marketplace for at least a reasonable quantity of such Product and
          such purchases continue to be in DuPont's economic interest; (4)
          assist PCN with the design of the CheMatch platform so that it becomes
          a more commercially desirable means of transacting business; and (5)
          provide PCN, at no cost to PCN, with a full time equivalent employee
          with knowledge of the relevant markets for a period of one year to
          work on increasing the volume of trading through the CheMatch
          platform.

     (c)  DuPont shall not invest in enterprises competing with PCN in the
          business of providing an on-line neutral marketplace with Product
          offerings which significantly overlap with those available through
          PCN, and specifically including without limitation ChemConnect, Inc.,
          and I to I Solutions Limited. Subject to the specific exclusion of
          ChemConnect, Inc., and I to I Solutions Limited, such prohibition
          shall not apply to investment by DuPont in enterprises in the business
          of providing an on-line neutral marketplace where DuPont's interest is
          to invest in such enterprises in order to enable DuPont to sell
          branded or specialty products. This provision shall remain in effect
          for the period during which DuPont or its affiliates maintain an
          equity interest in PCN, provided, however, that this provision shall
          remain in effect for at least one year from the date of the closing of
          the transactions contemplated by this letter agreement.

     (d)  DuPont shall provide PCN with a credit of $2 million towards the
          purchase of DuPont products and/or consulting services over a three
          year period from the closing of the Series C Preferred Stock
          Financing. The products and/or services shall include those related
          to market development, advertising, safety, health and environmental,
          logistics and other products or services as mutually agreed by the
          parties. Purchases of products shall be deducted from the $2 million
          total credit at list price less standard discount. Consulting
          services will be valued at $400 per hour. Additional services
          provided by DuPont may include without limitation items such as office
          space in international locations, attendance at trade conferences to
          provide testimonials or demonstrations of the CheMatch system,
          speaking at company or industry functions, trade shows or
          presentations to securities analysts.

4.   Additional Conditions.

     (a)  Subject to the execution of appropriate license agreements, DuPont
          will make available to CheMatch, for use on its site or through access
          to a DuPont Safety Resources site, certain safety, health and
          environmental information as agreed by the parties for a negotiated
          annual fee to be applied against the $2 million commitment pursuant to
          3(d) above to purchase DuPont products and services. Provided that
          the fee for any year is agreed by the parties, DuPont further agrees
          not to make such information available to ChemConnect, Inc. or
          E-Chemicals.

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     (b)  Provided that DuPont is in compliance with its obligations under
          paragraph 3, DuPont shall have the right to observe at PCN Board
          meetings so long as it owns 5% or more of PCN's Common Stock on a
          fully diluted basis (including Common Stock issuable on conversion of
          the Series C Preferred Stock warrants and options), but DuPont shall
          not be entitled to be present during any discussions relating to
          specific third party customers. DuPont shall give PCN notice prior to
          the date of the PCN Board meeting at which DuPont desires to have an
          observer. Such notice shall state the name of the observer and shall
          acknowledge that such observer is bound by confidentiality obligations
          to DuPont no less stringent than those set out in this letter
          agreement as a condition to the observer attending the PCN Board
          meeting.

     (c)  The securities which are the subject of this agreement have not been
          registered under the Securities Act of 1933, as amended, or applicable
          state securities laws. These securities have been acquired for
          investment and not with a view to distribution or resale, and may not
          be sold, mortgaged, pledged, hypothecated or otherwise transferred
          without an effective registration statement for such securities under
          the Securities Act of 1933, as amended, and applicable state
          securities laws, or the availability of an exemption from the
          registration provisions of the Securities Act of 1933 and applicable
          state securities laws. These securities will be further subject to any
          transfer restrictions imposed by the managing underwriter of the PCN
          initial public offering for such period following the PCN initial
          public offering as is determined by such managing underwriter.

     (d)  The parties agree to meet quarterly for a minimum period of two years
          to share ideas and recommendations on e-commerce strategies and site
          design as related to PCN's CheMatch platform and DuPont's e-commerce
          activities. There will be no consulting or other fees for those
          personnel participating in these quarterly sessions.

     (e)  DuPont and PCN shall use reasonable efforts to generate additional
          revenue streams for each other, which may include, for example,
          integration opportunities between PCN's CheMatch platform and DuPont's
          services.

     (f)  For a period of five years from the Closing of the transactions
          contemplated by this letter agreement, DuPont shall have the right of
          first negotiation to provide logistics, product testing and safety,
          health and environmental services or other services which are
          identified by DuPont to PCN as potential offerings. PCN shall be free
          to pursue with other parties any services which at such time are not
          identified by DuPont to PCN or which DuPont is not presently or at
          such time capable of delivering. Any such services provided by DuPont
          shall be at competitive rates and shall be subject to negotiation of
          definitive agreements.

5.   Confidentiality and Privacy.

     (a)  Both Parties shall maintain the confidentiality of each other's
          proprietary information pursuant to the confidentiality agreement
          between them dated October 19, 1999.

     (b)  PCN shall adopt a privacy policy no less comprehensive and with terms
          substantially similar to the then current terms of DuPont's privacy
          policy. DuPont shall not be obligated to provide information to PCN
          which is deemed

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          private under any applicable law, directive, statute, or regulation
          which would violate such law, directive, statue, or regulation
          provided that DuPont shall provide a copy of such policy to PCN and
          shall give notice of any changes in policies.

     (c)  Neither party may reference the other party to this agreement in
          presentations to third parties, advertising, promotions or other
          published information, unless such disclosure is required by law,
          without the other party's prior consent. Both parties may make
          disclosure of the existence of the DuPont investment in PCN in
          mutually agreed press releases provided that the detailed terms and
          conditions shall remain confidential unless required to be disclosed
          by law. Provided that, PCN and DuPont agree that they will issue a
          press release contemporaneous with the Series C Preferred Stock
          closing acknowledging and giving public notice of DuPont's inclusion
          as an investor in PCN, without giving specific details of the
          provisions of this agreement. Such press release is subject to mutual
          approval as to form and substance, which approval shall not be
          unreasonably withheld.

6.   Miscellaneous

     (a)  The Strategic Alliance, this letter agreement and all documentation
          contemplated by this letter shall be governed by the internal law of
          the State of Delaware, without regard to any conflict of laws
          principles.

     (b)  Each of PCN and DuPont will bear its own costs and expenses of the
          preparation of the documentation and performance of the obligations
          set forth in this letter.

     If this letter correctly sets forth our understanding, please indicate
your acceptance by executing this letter in the space provided below.

                                          Very truly yours,
                                          PETROCHEMNET HOLDINGS, INC.

                                          By: /s/ CARL D. MCCUTCHEON
                                              ----------------------------------
                                                  Carl D. McCutcheon
                                          President and Chief Executive Officer

ACCEPTED AND AGREED TO
THIS 12th day of November, 1999

E.I. duPont de Nemours and Company

By: /s/ J. ERIK FYRWALD
   --------------------
        J. ERIK FYRWALD

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