Exhibit B-5
                              ALLIANT ENERGY CORPORATION
                             % Series    Senior Notes due
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                                  PURCHASE AGREEMENT
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                                                      ,
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          [Purchaser[s] Name[s] and Address[es]]
          Ladies and Gentlemen:
          1.   Introduction.  Alliant Energy Corporation, a Wisconsin
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          corporation (the "Company"),  proposes to issue  and sell to  you
          (the "Initial Purchasers"), $            principal amount of its
                                       -----------
               % Series    Senior Notes due      (the "Securities"),
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          subject  to the  terms  and conditions  set  forth herein.    The
          Securities are to  be issued  pursuant to the  provisions of  the
          Indenture (for Unsecured Debt Securities), dated as of          ,
                                                                 ---------
              , between the Company and                     , as Trustee
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          (the "Trustee"), said Indenture,  together with any amendments or
          supplements  thereto,  being  hereinafter  referred  to  as   the
          "Indenture".
          2.   Terms of Offering.  The Securities will be offered and sold
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          to the Initial Purchasers pursuant to one or more exemptions from
          the registration  requirements under the Securities  Act of 1933,
          as  amended (the "Securities Act").  The Company has prepared and
          will deliver to the Initial Purchasers, on the date hereof or the
          next succeeding day, copies of an offering memorandum, dated
                   ,     , relating to the Securities, for use by the
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          Initial  Purchasers  in  connection  with  their solicitation  of
          purchases  of,  or  offerings  of,  the  Securities.    "Offering
          Memorandum" means, with respect  to any date or time  referred to
          in this Agreement, the most recent offering memorandum (including
          any  amendment or supplement to  such document as  of such date),
          including exhibits thereto and any documents incorporated therein
          by  reference, which  has  been  prepared  and delivered  by  the
          Company  to  the  Initial  Purchasers in  connection  with  their
          solicitation of purchases of, or offering of, the Securities.
               The  Initial Purchasers  have advised  the Company  that the
          Initial Purchasers will make offers (the "Exempt Resales") of the
          Securities  purchased hereunder  on the  terms set  forth  in the
          Offering Memorandum solely to persons whom the Initial Purchasers
          reasonably believe to be  (i) "qualified institutional buyers" as
          defined in  Rule 144A  under  the Securities  Act ("QIBs"),  (ii)
          other institutional  "accredited investors"  as  defined in  Rule
          501(a)(1),  (2), (3) or (7) under the Securities Act that execute
          and deliver  a certificate containing certain representations and
          agreements ("Institutional Accredited Investors"), and (iii) non-
          U.S. persons  to whom offers and  sales of the Securities  may be
          made  in reliance upon the  provisions of Regulation  S under the
          Securities  Act  (such  persons collectively  being  referred  to
          herein  as the  "Eligible Purchasers").   The  Initial Purchasers
          will offer  the Securities to Eligible Purchasers  initially at a
          price equal to       %  of the principal amount thereof.  Such
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          price may be changed at any time without notice.
               Upon original issuance  thereof, and until such time  as the
          same is no longer required pursuant to the Indenture with respect
          thereto, the Securities shall bear the following legend:
               "THIS SECURITY HAS NOT  BEEN REGISTERED UNDER THE SECURITIES
               ACT  OF 1933, AS AMENDED (THE "SECURITIES ACT").  THE HOLDER
               HEREOF, BY PURCHASING THIS  SECURITY, AGREES FOR THE BENEFIT
               OF THE COMPANY THAT THIS SECURITY MAY NOT BE RESOLD, PLEDGED
               OR  OTHERWISE  TRANSFERRED OTHER  THAN  (1) TO THE  COMPANY,
               (2) IN  A  TRANSACTION   ENTITLED  TO   AN  EXEMPTION   FROM
               REGISTRATION PROVIDED  BY RULE 144 UNDER THE SECURITIES ACT,
               (3) SO LONG AS THIS SECURITY IS ELIGIBLE FOR RESALE PURSUANT
               TO  RULE 144A UNDER THE  SECURITIES ACT ("RULE  144A"), TO A
               PERSON WHOM  THE SELLER  REASONABLY BELIEVES IS  A QUALIFIED
               INSTITUTIONAL   BUYER  WITHIN   THE  MEANING   OF  RULE 144A
               PURCHASING  FOR  ITS OWN  ACCOUNT OR  FOR  THE ACCOUNT  OF A
               QUALIFIED INSTITUTIONAL  BUYER TO WHOM NOTICE  IS GIVEN THAT
               THE RESALE,  PLEDGE  OR  OTHER  TRANSFER IS  BEING  MADE  IN
               RELIANCE  ON RULE 144A (AS  INDICATED BY THE  BOX CHECKED BY
               THE TRANSFEROR ON THE CERTIFICATE OF TRANSFER ON THE REVERSE
               OF  THIS  SECURITY),  (4) IN  AN  OFFSHORE  TRANSACTION   IN
               ACCORDANCE  WITH   RULE  904   OF  REGULATION S   UNDER  THE
               SECURITIES  ACT  (AS INDICATED  BY  THE BOX  CHECKED  BY THE
               TRANSFEROR ON  THE CERTIFICATE OF TRANSFER ON THE REVERSE OF
               THIS  SECURITY),  OR  (5) TO   AN  INSTITUTION  THAT  IS  AN
               "ACCREDITED INVESTOR" AS DEFINED IN RULE 501(a)(1), (2), (3)
               OR (7) UNDER  THE SECURITIES  ACT (AS INDICATED  BY THE  BOX
               CHECKED  BY THE TRANSFEROR ON THE CERTIFICATE OF TRANSFER ON
               THE  REVERSE  OF  THIS  SECURITY)  THAT  IS  ACQUIRING  THIS
               SECURITY FOR INVESTMENT  PURPOSES AND NOT  FOR DISTRIBUTION,
               AND A CERTIFICATE IN  THE FORM ATTACHED TO THIS  SECURITY IS
               DELIVERED BY  THE TRANSFEREE TO THE COMPANY  AND THE TRUSTEE
               IN EACH  CASE IN  ACCORDANCE WITH ANY  APPLICABLE SECURITIES
               LAWS  OF ANY STATE OF  THE UNITED STATES.   AN INSTITUTIONAL
               ACCREDITED INVESTOR  HOLDING THIS  SECURITY  AGREES IT  WILL
               FURNISH TO THE COMPANY AND THE TRUSTEE SUCH CERTIFICATES AND
               OTHER INFORMATION AS THEY  MAY REASONABLY REQUIRE TO CONFIRM
               THAT ANY TRANSFER BY  IT OF THIS SECURITY COMPLIES  WITH THE
               FOREGOING RESTRICTIONS.   THE  HOLDER HEREOF,  BY PURCHASING
               THIS SECURITY, REPRESENTS AND AGREES FOR THE  BENEFIT OF THE
               COMPANY  THAT  IT  IS (1) A  QUALIFIED  INSTITUTIONAL  BUYER
               WITHIN THE  MEANING OF RULE 144A OR  (2) AN INSTITUTION THAT
               IS AN  "ACCREDITED INVESTOR"  AS DEFINED IN  RULE 501(a)(1),
               (2), (3)  OR (7)  UNDER THE  SECURITIES ACT AND  THAT IT  IS
               HOLDING THIS  SECURITY FOR  INVESTMENT PURPOSES AND  NOT FOR
               DISTRIBUTION  OR (3) A  NON-U.S. PERSON  OUTSIDE THE  UNITED
               STATES  WITHIN THE MEANING OF,  OR AN ACCOUNT SATISFYING THE
               REQUIREMENTS   OF  PARAGRAPH   (o)(2)  OF   RULE 902  UNDER,
               REGULATION S UNDER THE SECURITIES ACT."
          3.   Representations and Warranties of the Company.  The Company
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          represents and warrants to the Initial Purchasers that:
                    a.   At the  date hereof, the Offering  Memorandum does
               not, and at  the Closing Date,  as hereinafter defined,  the
               Offering Memorandum will not, contain an untrue statement of
               a material fact or omit to state a material fact required to
               be  stated  therein  or  necessary to  make  the  statements
               therein   not  misleading;   provided  that   the  foregoing
               representations and  warranties in this  paragraph (a) shall
               not apply to statements  or omissions made in  reliance upon
               and  in conformity  with  the information  furnished to  the
               Company  in  writing  by,  or  on  behalf  of,  the  Initial
               Purchasers expressly for use in the Offering Memorandum.
                    b.   The  consummation  of   the  transactions   herein
               contemplated and  the fulfillment  of the terms  hereof will
               not result  in  a material  breach of  any of  the terms  or
               provisions of,  or constitute a material  default under, any
               indenture,  mortgage, deed  of trust  or other  agreement or
               instrument to which the Company is now a party.
                    c.   Subject  to compliance  by the  Initial Purchasers
               with the representations and warranties set forth in Section
               7 hereof and, with respect to sales  to Eligible Purchasers,
               compliance by the Initial  Purchasers with the provisions of
               Rule 144A, Regulation D  and Regulation S applicable to  the
               Initial Purchasers in connection with  such sales, it is not
               necessary in connection with the offer, sale and delivery of
               the Securities by the Company to the Initial  Purchasers and
               by  the Initial Purchasers to each Eligible Purchaser in the
               manner  contemplated  by  this Agreement  and  the  Offering
               Memorandum to register  the Securities under  the Securities
               Act  or to qualify  the Indenture under  the Trust Indenture
               Act of 1939, as amended.
                    d.   The  Company  has  not,  directly  or  indirectly,
               solicited any offer to buy or offered to sell, and will not,
               directly or indirectly, solicit any offer to buy or offer to
               sell, in the United  States or to any United  States citizen
               or resident, any  security which is  or would be  integrated
               with  the  sale of  the Securities  in  a manner  that would
               require the Securities to be registered under the Securities
               Act.
                    e.   The Securities are eligible for resale pursuant to
               Rule 144A and will not be, at the Closing Date,  of the same
               class as securities listed on a national securities exchange
               registered  under Section 6 of the Exchange Act, of 1934, as
               amended  (the "Exchange Act") or  quoted in a U.S. automated
               interdealer quotation system.
                    f.   None of the Company,  its affiliates, as such term
               is  defined   in  Rule  501(b)  under   the  Securities  Act
               ("Affiliates"),  or  any  person  acting on  behalf  of  the
               Company or any Affiliate (other than the Initial Purchasers,
               as to whom the Company makes no representation)  has engaged
               or will  engage,  in connection  with  the offering  of  the
               Securities, in  any form of general  solicitation or general
               advertising  within the  meaning  of Rule  502(c) under  the
               Securities Act.
                    g.   With respect to those  Securities sold in reliance
               on  Regulation S, (A) none of the Company, its Affiliates or
               any person acting  on its  or their behalf  (other than  the
               Initial  Purchasers,  as  to   whom  the  Company  makes  no
               representation) has  engaged or will engage  in any directed
               selling  efforts within the meaning  of Regulation S and (B)
               each of the Company and its Affiliates and any person acting
               on its or their behalf  (other than the Initial  Purchasers,
               as to whom the Company makes no representation) has complied
               and will comply with  the offering restrictions requirements
               of Regulation S.
                    The Company  acknowledges that the  Initial Purchasers,
          and, for purposes of the opinions  to be delivered to the Initial
          Purchasers  pursuant to Section 8  hereof, counsel to the Company
          and counsel to the Initial Purchasers will rely upon the accuracy
          and truth of the foregoing representations and the Company hereby
          consents to such reliance.
          4.   Purchase and Sale.  On the basis of the representations and
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          warranties  herein  contained,  and  subject  to  the  terms  and
          conditions  herein set forth, the  Company agrees to  sell to the
          Initial Purchasers, and each  of the Initial Purchasers severally
          and not jointly agrees to purchase  from the Company, at the time
          and  place   herein  specified,  the  principal   amount  of  the
          Securities set forth opposite the name of such Initial  Purchaser
          in Schedule I attached hereto, at a purchase price equal to
                % of the principal amount thereof.
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          5.   Time and Place of Closing.  Delivery of the Securities
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          against payment therefor by wire  transfer in federal funds shall
          be made at the office of                      ,             , at
                                   ---------------------  -- ---------
                    ,      Time, on           ,     , or at such other
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          place, time  and date as shall  be agreed upon in  writing by the
          Company and the Initial  Purchasers.  The hour  and date of  such
          delivery and payment are  herein called the "Closing Date".   The
          Securities shall be  delivered to the  Initial Purchasers, or  as
          directed by the  Initial Purchasers, in fully  registered form in
          such denominations of $      and in integral multiples of $
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          in excess thereof  and registered  in such names  as the  Initial
          Purchasers shall reasonably request in writing not later than the
          close of business on the second business day prior to the Closing
          Date, or, to the extent not so requested, registered in the names
          of the Initial Purchasers in such authorized denominations as the
          Company  shall  determine.    The  Company  agrees  to  make  the
          Securities  available  to  the  Initial Purchasers  for  checking
          purposes not later than       A.M.,          Time, on the last
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          business day preceding the Closing Date at the office of
                                                  .
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          6.   Covenants of the Company.  The Company agrees with the
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          Initial Purchasers as follows:
                    a.   To  advise  the  Initial  Purchasers  (i)  of  the
               issuance  by any  state  securities commission  of any  stop
               order   suspending  the  qualification   or  exemption  from
               qualification of any of the Securities for offering or sale,
               or the initiation of any proceeding by any  state securities
               commission   or  any  other   federal  or  state  regulatory
               authority  for such purpose and (ii) of the happening of any
               event during  the period referred  to in Section  6(c) below
               that  makes any  statement of  a material  fact made  in the
               Offering Memorandum untrue or that requires any additions to
               or changes in the  Offering Memorandum in order to  make the
               statements  therein,  in  light of  the  circumstances under
               which they were made, not misleading.  The Company shall use
               its best efforts to  prevent the issuance of any  stop order
               or order suspending the qualification or exemption of any of
               the Securities  under any state securities  or blue-sky laws
               and, if at any time any state securities commission or other
               federal or  state regulatory authority shall  issue an order
               suspending  the qualification  or  exemption of  any of  the
               Securities under any state  securities or blue-sky laws, the
               Company  shall use  its best  efforts to  obtain the  prompt
               withdrawal or lifting of such order.
                    b.   To furnish the Initial  Purchasers as many  copies
               of  the   Offering   Memorandum,  and   any  amendments   or
               supplements   thereto,  as   the   Initial  Purchasers   may
               reasonably  request.   Subject  to the  Initial  Purchasers'
               compliance  with  its  representations  and  warranties  and
               agreements  set  forth  in  Section 7  hereof,  the  Company
               consents  to the  use of  the Offering  Memorandum, and  any
               amendments and supplements thereto required pursuant hereto,
               by the Initial Purchasers in connection with Exempt Resales.
                    c.   If,  during such  period  (not exceeding  the nine
               month period following the date of this Agreement) as in the
               opinion  of counsel  for the  Initial Purchaser  an Offering
               Memorandum is required by law to be delivered in  connection
               with  Exempt Resales  by the  Initial Purchasers,  any event
               relating to or affecting the Company or of which the Company
               shall be advised in writing by  the Initial Purchasers shall
               occur which, in the  Company's reasonable opinion, should be
               set  forth in  a  supplement to,  or  an amendment  of,  the
               Offering Memorandum in order to make the Offering Memorandum
               not misleading in  the light of the  circumstances when such
               Offering Memorandum is delivered  to an Eligible  Purchaser,
               the  Company will,  at its  expense, prepare  an appropriate
               amendment or supplement to  such Offering Memorandum so that
               the Offering Memorandum, as so amended or supplemented, will
               not  contain any untrue statement of a material fact or omit
               to  state any material fact  necessary in order  to make the
               statements therein,  in light of the  circumstances when the
               Offering Memorandum is delivered  to an Eligible  Purchaser,
               not  misleading;  provided  that  should  such event  relate
               solely to the activities of any Initial Purchaser, then such
               Initial Purchaser shall assume  the expense of preparing and
               furnishing any  such amendment or  supplement.  In  case any
               Initial   Purchaser  is  required  to  deliver  an  Offering
               Memorandum after the expiration of nine months from the date
               of   this  Agreement,   the  Company,   upon   such  Initial
               Purchaser's request, will furnish to the  Initial Purchaser,
               at such  Initial Purchaser's expense, a  reasonable quantity
               of  any such  amendment or  supplement referred  to in  this
               Section 6(c).
                    d.   To  furnish  such  proper  information as  may  be
               lawfully required  and otherwise cooperate in qualifying the
               Securities for offer and sale to  the Initial Purchasers and
               pursuant  to Exempt Resales under the  blue-sky laws of such
               jurisdictions  as  the  Initial  Purchasers  may  designate,
               provided that the  Company shall not be required to register
               or qualify as a foreign corporation or dealer in securities,
               to file any consents to service of process under the laws of
               any jurisdiction,  or to meet any  other requirements deemed
               by the Company to be unduly burdensome.
                    e.   So  long   as  any   of   the  Securities   remain
               outstanding and  during any period  in which the  Company is
               not subject  to Section 13 or 15(d)  of the Exchange Act, to
               make  available to  any holder  of Securities  in connection
               with any sale thereof and  any prospective purchaser of such
               Securities  from such  holder,  the information  ("Rule 144A
               Information")   required  by   Rule  144A(d)(4)   under  the
               Securities Act.
                    f.   To  obtain the  approval of  the  Depositary Trust
               Company ("DTC") for "book-entry" transfer of  the Securities
               of each series, and to comply with all of its agreements set
               forth in  the representation  letter of  the Company to  DTC
               relating to the approval of the Securities by DTC for "book-
               entry" transfer.
                    g.   Not to sell, offer  for sale or solicit offers  to
               buy or  otherwise negotiate in  respect of any  security (as
               defined in the Securities Act) that would be integrated with
               the  sale of  the  Securities to  the Initial  Purchasers or
               pursuant  to Exempt Resales  in a manner  that would require
               the registration of  any such sale  of the Securities  under
               the Securities Act.
                    h.   None of the Company,  its Affiliates or any person
               acting  on  its  or their  behalf  (other  than  the Initial
               Purchasers) will engage in  any directed selling efforts (as
               that term is  defined in Regulation  S under the  Securities
               Act)  with  respect  to  the  Securities  sold  pursuant  to
               Regulation  S, and the  Company and its  Affiliates and each
               person acting on its or their behalf (other than the Initial
               Purchasers)  will comply with  the offering  restrictions of
               Regulation S with respect  to those Securities sold pursuant
               thereto.
                    i.   Until  the  expiration  of  two  years  after  the
               original issuance  of the Securities, the  Company will not,
               and will cause its  Affiliates not to, purchase or  agree to
               purchase  or  otherwise  acquire  any  Securities which  are
               "restricted  securities" (as  such term  is defined  in Rule
               144(a)(3) under  the Securities Act),  whether as beneficial
               owner or otherwise (except as  agent acting as a  securities
               broker on  behalf of and for the account of customers in the
               ordinary   course  of   business  in   unsolicited  broker's
               transactions) unless, promptly upon  any such purchase,  the
               Company or any Affiliate shall submit such Securities to the
               Trustee for cancellation.
          7.   Initial Purchaser's Representations and Warranties.  Each
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          Initial Purchaser represents and warrants to and  agrees with the
          Company, that:
                    a.   It  is  a  QIB   or  an  Institutional  Accredited
               Investor,  with such  knowledge and experience  in financial
               and business  matters as is  necessary in order  to evaluate
               the merits and risks of an investment in the Securities.
                    b.   It is not acquiring the  Securities with a view to
               any distribution (as such term is used  under the Securities
               Act) thereof or  with any present  intention of offering  or
               selling any  of the Securities  in a transaction  that would
               violate the  Securities Act  or the  securities laws  of any
               state  of   the  United  States  or   any  other  applicable
               jurisdiction.
                    c.   It agrees that no  form of general solicitation or
               general  advertising (within  the  meaning  of Regulation  D
               under the  Securities Act) has been or will be used by it or
               any of its representatives in connection with the offer  and
               sale of  the Securities pursuant hereto,  including, but not
               limited  to,  articles,  notices  or   other  communications
               published in  any newspaper,  magazine or similar  medium or
               broadcast  over  television  or  radio, or  any  seminar  or
               meeting  whose attendees  have been  invited by  any general
               solicitation or general advertising.
                    d.   It agrees that, in connection with Exempt Resales,
               it  will solicit offers to buy the Securities only from, and
               will  offer  to  sell   the  Securities  only  to,  Eligible
               Purchasers that  agree that (x) the  Securities purchased by
               them may  be resold,  pledged or otherwise  transferred only
               (I)  to  the  Company, (II)  to  a  person  whom the  seller
               reasonably  believes is a QIB purchasing for its own account
               or  for the account  of a QIB  in a transaction  meeting the
               requirements of Rule 144A under the Securities Act, (III) in
               an  offshore transaction (as  defined in Rule  902 under the
               Securities Act) meeting the requirements of Rule 904 of  the
               Securities   Act,  (IV)   in  a   transaction  meeting   the
               requirements of Rule 144 under the Securities Act, (V) to an
               Institutional   Accredited  Investor  that,  prior  to  such
               transfer,   furnishes   the    Trustee   a   signed   letter
               (substantially in the form of Appendix I to the Offering
                                             ----------
               Memorandum)  and,  if such  transfer  is  in respect  of  an
               aggregate principal amount of Securities less than $100,000,
               an opinion of  counsel acceptable to  the Company that  such
               transfer is in compliance  with the Securities Act, (VI)  in
               accordance  with  another  exemption  from  the registration
               requirements  of  the  Securities  Act (and  based  upon  an
               opinion  of  counsel acceptable  to  the  Company) or  (VII)
               pursuant to an effective registration statement and, in each
               case, in  accordance with the applicable  securities laws of
               any  state of  the  United States  or  any other  applicable
               jurisdiction  and (y) they  will deliver  to each  person to
               whom such Securities or an interest therein is transferred a
               notice substantially to the effect of the foregoing.
                    e.   It agrees that it will not  offer, sell or deliver
               any of the Securities in any jurisdiction outside the United
               States, except pursuant to Regulation S under the Securities
               Act.
                    The Initial  Purchasers  acknowledge that  the  Company
          and, for purposes of the opinions to  be delivered to the Initial
          Purchasers pursuant to Section  8 hereof, counsel to the  Company
          and counsel to the Initial Purchasers will rely upon the accuracy
          and  truth  of  the  foregoing representations  and  the  Initial
          Purchasers hereby consent to such reliance.
          8.   Conditions of the Initial Purchasers' Obligations.  The
               -------------------------------------------------
          obligations of the Initial Purchasers to purchase and pay for the
          Securities  shall  be  subject  to  the  accuracy  of  the   rep-
          resentations  and  warranties  made herein  on  the  part  of the
          Company,  to the performance by the Company of its obligations to
          be  performed hereunder  prior to  the Closing  Date, and  to the
          following conditions:
                    a.   The  Company shall  have furnished to  the Initial
               Purchaser the opinion of                  , the Counsel of
                                        -----------------
               the Company, dated the Closing Date, to the effect that:
                    (i)  the Company  is a  corporation duly  organized and
                    validly existing and in good standing under the laws of
                    Wisconsin and has due  corporate power and authority to
                    own  its  properties   and  conduct  its  business   as
                    described  in the  Offering  Memorandum,  and  is  duly
                    qualified to conduct in            the businesses in
                                            ----------
                    which it is engaged in those States, which are the only
                    States in which it is required to be so qualified;
                    (ii)  the  Company  has  full power  and  authority  to
                    execute  the Indenture  and  to  issue  the  Securities
                    thereunder, and the Indenture has been duly authorized,
                    executed and delivered by  the Company, and constitutes
                    a valid  and legally binding instrument  by the Company
                    enforceable against the Company  in accordance with its
                    terms;
                    (iii) the  Securities and the Indenture  have been duly
                    authorized, executed  and  issued by  the Company  and,
                    assuming due authentication thereof by the  Trustee and
                    upon  payment for  and  delivery of  the Securities  in
                    accordance with the terms  of this Agreement, they will
                    constitute valid and legally binding obligations of the
                    Company  enforceable against the  Company in accordance
                    with their terms  and entitled to  the benefits of  the
                    Indenture;
                    (iv)  the  Company  has  full power  and  authority  to
                    execute this Agreement and this Agreement has been duly
                    authorized, executed and delivered by the Company;
                    (v) an  appropriate order  or orders of  the Commission
                    under the  Public Utility  Holding Company Act  of 1935
                    authorizing the issuance and  sale of the Securities is
                    in effect  on the Closing Date and no further approval,
                    authorization, consent or order of any other commission
                    or other governmental authority (other than under state
                    securities  or blue sky laws, as  to which such counsel
                    are  not called upon to express an opinion) is required
                    for the issuance and sale of the Securities;
                    (vi) the  execution and delivery of  the Indenture, the
                    Securities and this  Agreement, and the fulfillment  of
                    the terms thereof and  hereof by the Company, will  not
                    result  in a breach of  any of the  terms or provisions
                    of, or constitute  a default   under any provision  of,
                    the Company's  articles of incorporation  or by-laws or
                    any  indenture,  mortgage,  deed   of  trust  or  other
                    agreement  or  instrument, of  which  such counsel  has
                    knowledge, to which the  Company is now a party  or, to
                    the best  of such counsel's knowledge,  any order, rule
                    or regulation  of any  court or governmental  agency or
                    body having jurisdiction over the Company or any of its
                    activities or properties;
                    (vii)  the  provisions   of  the  Securities   and  the
                    Indenture conform in all  material respects as to legal
                    matters to  the statements concerning them contained in
                    the Offering Memorandum under "              " and
                                                   --------------
                     "                                        ";
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                    (viii)  the   franchises,  permits  and  licenses under
                    which the Company operates in the States of Wisconsin,
                             and       are adequate to permit the Company
                    --------     -----
                    to engage in the businesses which it presently conducts
                    in  those   States  and  do  not   contain  any  unduly
                    burdensome  provisions;  in those  municipalities where
                    the  Company  operates   without  franchises  or  where
                    expired franchises  have not been renewed,  the lack of
                    such   franchises   does not   materially   affect  the
                    Company's  operations  in  such municipalities  and  no
                    actions  or   proceedings  are  pending   or,  to  such
                    counsel's knowledge, threatened by  such municipalities
                    which would materially affect the Company's operations;
                    (ix) it is not necessary in connection with the  offer,
                    sale  and  delivery  of   the  Securities  to  you  and
                    (assuming  such offer,  sale and  delivery are  made in
                    compliance   with  the   provisions  of   the  Purchase
                    Agreement  and  in  the  manner   contemplated  by  the
                    Offering  Memorandum) to  each subsequent  purchaser to
                    register the Securities under  the Securities Act or to
                    qualify the Indenture under  the Trust Indenture Act of
                    1939, as amended; and
                    (x)  each document filed by  the Company or  any of its
                    subsidiaries   with   the   Securities   and   Exchange
                    Commission ("Commission") pursuant to the Exchange Act,
                    and   incorporated  by   reference   in  the   Offering
                    Memorandum (except  as to the financial  statements and
                    schedules  and other  financial  and  statistical  data
                    contained therein,  as to  which they need  not express
                    any  belief),  at  the  time  it  was  filed  with  the
                    Commission,  complied  as  to  form   in  all  material
                    respects  with the  Exchange  Act  and  the  applicable
                    instructions,  rules and regulations  of the Commission
                    thereunder.
                    Such counsel's opinion set forth in paragraphs (ii) and
               (iii) above may  be subject to  the qualifications that  the
               enforceability  of  the   Company's  obligations  under  the
               Indenture and  the Securities may be  limited by bankruptcy,
               insolvency,    fraudulent    conveyance,     reorganization,
               moratorium and  other similar laws relating  to or affecting
               creditor's rights generally, by general equitable principles
               (regardless of  whether such enforceability is considered in
               a proceeding in equity or at law) and by an implied covenant
               of good faith and fair dealing.
                    Such opinion shall also state  that such counsel has no
               knowledge of  any litigation,  pending or  threatened, which
               challenges the validity of the Securities, the Indenture, or
               this Agreement,  or which seeks to enjoin the performance of
               the Company's  obligations thereunder or which  might have a
               material   adverse  effect  on the  business, properties  or
               financial condition of the Company except as disclosed in or
               contemplated by the Offering Memorandum.
                    In rendering such opinion, such  counsel may rely as to
               factual matters upon certificates or written statements from
               others or other  appropriate representatives of  the Company
               or upon  certificates of public officials.  In such opinion,
               such  counsel may state that while such counsel has examined
               the  Offering Memorandum, such   counsel necessarily assumes
               the correctness and completeness  of the statements made and
               information included  therein  and takes  no  responsibility
               therefor, except  insofar as such statements  relate to such
               counsel and as set forth in paragraph (vii) above.
                    Such  counsel's opinion  may further  state that  it is
               addressed to  the Initial Purchasers and  is rendered solely
               for their   benefit and may not be relied upon in any manner
               by any other  person (other than                          to
                                                 -----------------------
               the extent  stated in its opinion to  the Initial Purchasers
               as of the Closing Date) without such counsel's prior written
               consent.
                    b. The  Initial Purchasers shall have received from
                           ,  counsel for the Initial Purchasers, such
               ------------
               opinion or opinions, dated the Closing Date, with respect to
               the issuance and sale of the Securities,  the Indenture, the
               Offering Memorandum (together  with any supplement  thereto)
               and  other  related matters  as  the  Initial Purchaser  may
               reasonably require,  and the Company shall have furnished to
               such counsel such  documents as they request for the purpose
               of enabling them to pass upon such matters.
                    c. The  Company shall  have  furnished to  the  Initial
               Purchasers  a  certificate of  the  Company,  signed by  the
               Chairman  of the Board  or the  President and  the principal
               financial or accounting  officer of the  Company, dated  the
               Closing  Date, to  the  effect  that  the  signers  of  such
               certificate have carefully examined the Offering Memorandum,
               and this Agreement and that:
                    (i) the representations  and warranties of  the Company
               in  this  Agreement are  true  and correct  in  all material
               respects on and as  of the Closing Date with the same effect
               as if made on the Closing  Date and the Company has complied
               with all the agreements and satisfied all the conditions  on
               its part to  be performed or  satisfied at or  prior to  the
               Closing Date; and
                    (ii)   since  the  date of  the  most recent  financial
               statements included in the Offering Memorandum (exclusive of
               any supplement thereto), there has been no material  adverse
               change  in the  condition  (financial  or other),  earnings,
               business or  properties  of  the  Company,  whether  or  not
               arising  from   transactions  in  the  ordinary   course  of
               business, except  as set  forth in  or  contemplated in  the
               Offering Memorandum (exclusive of any supplement thereto).
                    d.  At the Closing Date,                 , independent
                                             ----------------
               accountants shall have furnished to the Initial Purchasers a
               letter or letters, dated as of the Closing Date, in form and
               substance satisfactory  to  you, containing  statements  and
               information of the type ordinarily  included in accountants'
               "  comfort  letters" to  underwriters  with  respect to  the
               financial  statements  and  certain   financial  information
               contained in or incorporated by reference into the  Offering
               Memorandum.
                    e. Subsequent to  the date and time when this Agreement
               is  executed  and delivered  by  the parties  hereto  or, if
               earlier, the dates as  of which information is given  in the
               Offering  Memorandum,  there shall  not  have  been (i)  any
               change or  decrease  specified  in  the  letter  or  letters
               referred to in  paragraph (d) of this Section 8  or (ii) any
               change, or  any development involving a  prospective change,
               in or affecting  the business or  properties of the  Company
               the  effect  of which  is, in  the  judgment of  the Initial
               Purchasers,  so  material   and  adverse  as   to  make   it
               impractical or  inadvisable to proceed with  the offering or
               delivery of  the Securities as contemplated  by the Offering
               Memorandum.
                    f. Prior  to the Closing  Date, the Company  shall have
               furnished   to   the   Initial   Purchasers   such   further
               information,  certificates  and  documents  as  the  Initial
               Purchasers may reasonably request.
               If any of the  conditions specified in this Section  8 shall
          not  have been  fulfilled in  all material  respects when  and as
          provided  in  this  Agreement, or  if  any  of  the opinions  and
          certificates mentioned above or elsewhere in this Agreement shall
          not be in  all material respects reasonably  satisfactory in form
          and substance  to  the Initial  Purchasers  and counsel  for  the
          Initial  Purchasers, this  Agreement and  all obligations  of the
          Initial Purchasers hereunder may  be canceled at, or at  any time
          prior to, the Closing Date by  the Initial Purchasers.  Notice of
          such cancellation  shall be given to the Company in writing or by
          telephone or electronic transmittal confirmed in writing.
          9.   Reimbursement of Initial Purchasers' Expenses.  If the sale
               ----------------------------------------------
          of the Securities provided for herein is  not consummated because
          any condition to the  obligations of the  Initial  Purchasers set
          forth  in Section  8  hereof is  not  satisfied, because  of  any
          termination  pursuant to  Section  11 hereof  or  because of  any
          refusal,  inability  or failure  on the  part  of the  Company to
          perform any agreement herein or comply with any  provision hereof
          other  than  by  reason  of  a  default by  any  of  the  Initial
          Purchasers, the  Company  will reimburse  the Initial  Purchasers
          severally upon  demand for all out-of-pocket  expenses (including
          reasonable  fees and  disbursements of  counsel) that  shall have
          been incurred by  them in connection  with the proposed  purchase
          and sale of the Securities.
          10.  Indemnification and Contribution.
               ---------------------------------
                    a. The Company  agrees to indemnify  and hold  harmless
               each Initial  Purchaser, the directors,  officers, employees
               and  agents of each  Initial Purchaser  and each  person who
               controls any Initial Purchaser within the meaning of Section
               15 of the Securities Act against any and all losses, claims,
               damages or liabilities,  joint or several, to  which they or
               any of them may  become subject under the Securities  Act or
               other  Federal  or state  statutory  law  or regulation,  at
               common  law or  otherwise, insofar  as such  losses, claims,
               damages or liabilities (or actions in respect thereof) arise
               out of or  are based  upon any untrue  statement or  alleged
               untrue  statement  of  a  material  fact  contained  in  the
               Offering Memorandum, or arise  out of or are based  upon the
               omission  or alleged  omission to  state therein  a material
               fact  required to be stated therein or necessary to make the
               statements therein  not misleading, and agrees  to reimburse
               each such  indemnified party, as incurred, for  any legal or
               other  expenses reasonably  incurred by  them in  connection
               with  investigating  or  defending  any  such  loss,  claim,
               damage,  liability  or action,  provided, however,  that the
               Company will  not be liable in  any such case to  the extent
               that any such loss, claim, damage or liability arises out of
               or is based upon any such untrue statement or alleged untrue
               statement or omission  or alleged omission  made therein  in
               reliance  upon and  in conformity  with written  information
               furnished  to   the  Company   by   any  Initial   Purchaser
               specifically  for  inclusion    therein.     This  indemnity
               agreement will  be in  addition to  any liability  which the
               Company may otherwise have.
                    b. Each Initial Purchaser severally agrees to indemnify
               and  hold harmless the Company,  each of its directors, each
               of its  officers, and each  person who controls  the Company
               within the meaning of  Section 15 of the Securities  Act, to
               the same extent as the foregoing indemnity from the  Company
               to each  Initial  Purchaser,  but  only  with  reference  to
               written  information  relating  to  such  Initial  Purchaser
               furnished  to  the  Company by  or  on  behalf such  Initial
               Purchaser,  specifically  for  inclusion  in  the  documents
               referred to  in the  foregoing  indemnity.   This  indemnity
               agreement will  be in  addition to  any liability which  any
               Initial   Purchaser   may   otherwise  have.   The   Company
               acknowledges that the statements set forth in
                                   under the caption  "            " in the
               ------------------                      ------------
               Offering  Memorandum  constitute    the  only    information
               furnished in writing by the Initial Purchasers for inclusion
               in the documents referred to in the foregoing indemnity, and
               you, as the Initial Purchaser, confirm that such  statements
               are correct.
                    c. Promptly after receipt by an indemnified party under
               this Section 10 of notice of the commencement of any action,
               such indemnified party will,  if a claim in respect  thereof
               is  to be  made against  the indemnifying  party under  this
               Section 10, notify the indemnifying party  in writing of the
               commencement  thereof;  but the  failure  so  to notify  the
               indemnifying party (i)  will not relieve  it from  liability
               under paragraph (a) or (b) above unless and to the extent it
               did  not otherwise  learn of  such action  and such  failure
               results  in  the forfeiture  by  the  indemnifying party  of
               substantial rights  and defenses; and (ii) will  not, in any
               event, relieve the indemnifying  party from any  obligations
               to any  indemnified  party other  than  the  indemnification
               obligation  provided  in paragraph  (a)  or  (b) above.  The
               indemnifying party  shall be entitled to  appoint counsel of
               the indemnifying party's choice  at the indemnifying party's
               expense to represent the indemnified party in any action for
               which  indemnification   is  sought   (in  which   case  the
               indemnifying party shall  not thereafter be  responsible for
               the  fees and expenses  of any separate  counsel retained by
               the indemnified party or parties except as set forth below);
               provided,  however, that such  counsel shall be satisfactory
               to  the indemnified party.  Notwithstanding the indemnifying
               party's  election  to  appoint  counsel  to  represent   the
               indemnified party in an action, the indemnified party  shall
               have the  right to employ separate  counsel (including local
               counsel),  and  the   indemnifying  party  shall  bear   the
               reasonable fees, costs and expenses of such separate counsel
               if (i) the use  of counsel chosen by the  indemnifying party
               to  represent  the  indemnified  party  would  present  such
               counsel  with a  conflict of  interest; (ii)  the actual  or
               potential defendants  in, or  targets  of, any  such  action
               include  both  the indemnified  party  and the  indemnifying
               party  and  the  indemnified  party  shall  have  reasonably
               concluded that there  may be legal defenses  available to it
               and/or other indemnified parties which are different from or
               additional  to those  available to  the indemnifying  party;
               (iii) the indemnifying party shall not have employed counsel
               satisfactory  to  the  indemnified party  to  represent  the
               indemnified party  within a reasonable time  after notice of
               the  institution of  such action;  or (iv)  the indemnifying
               party  shall  authorize  the  indemnified  party  to  employ
               separate counsel  at the expense of  the indemnifying party.
               An indemnifying party  will not, without  the prior  written
               consent of the indemnified parties, settle or compromise  or
               consent to the  entry of  any judgment with  respect to  any
               pending or  threatened claim, action, suit  or proceeding in
               respect  of  which indemnification  or  contribution  may be
               sought hereunder (whether or not the indemnified parties are
               actual or potential parties to such claim  or action) unless
               such   settlement,   compromise  or   consent   includes  an
               unconditional  release of  each  indemnified party  from all
               liability  arising  out  of  such  claim,  action,  suit  or
               proceeding.
                    d.  In  the  event  that  the  indemnity  provided   in
               paragraph  (a)  or   (b)  of  this   Section  10  shall   be
               unenforceable under the applicable law, the Company and  the
               Initial  Purchasers agree  to  contribute to  the  aggregate
               losses, claims, damages and  liabilities (including legal or
               other  expenses  reasonably   incurred  in  connection  with
               investigating or defending  same)(collectively "Losses")  to
               which  the Company and one or more of the Initial Purchasers
               may  be subject  in  such proportion  as  is appropriate  to
               reflect the relative  benefits received by the Company   and
               by  the   Initial  Purchasers  from  the   offering  of  the
               Securities. If  the allocation  provided by  the immediately
               preceding  sentence  is  unavailable  for  any  reason,  the
               Company and the Initial Purchasers shall contribute in  such
               proportion as  is  appropriate  to  reflect  not  only  such
               relative benefits but also the relative fault of the Company
               and  of  the  Initial  Purchasers  in  connection  with  the
               statements  or omissions  which resulted  in such  Losses as
               well  as  any    other  relevant  equitable  considerations.
               Benefits received by the Company shall be deemed to be equal
               to  the  total  net  proceeds  from  the  offering   (before
               deducting expenses), as set  forth on the cover page  of the
               Offering Memorandum.  Relative fault shall be determined  by
               reference to, among other things, whether any alleged untrue
               statement of a material fact or omission to state a material
               fact relates  to information  provided by  such indemnifying
               party or  the indemnified party and each  such party's rela-
               tive  intent, knowledge,  access to  information and  oppor-
               tunity to  correct  or  prevent  such  untrue  statement  or
               omission. The Company and the Initial Purchasers agree  that
               it  would not be just  and equitable if  contributions  were
               determined by  pro rata  allocation or any  other method  of
               allocation which  does not  take  account of  the  equitable
               considerations  referred  to   above.  Notwithstanding   the
               provisions of  this   paragraph  (d),  no person  guilty  of
               fraudulent  misrepresentation (within the meaning of Section
               11(f)  of  the   Securities  Act)  shall   be  entitled   to
               contribution from any   person  who was not  guilty of  such
               fraudulent misrepresentation.    For    purposes    of  this
               Section 10, each  person who controls  an Initial  Purchaser
               within the meaning of  Section 15 of the Securities  Act and
               each  director, officer,  employee and  agent of  an Initial
               Purchaser shall have the same rights to contribution as such
               Initial Purchaser, and each person who controls the  Company
               within  the meaning of Section 15 of the Securities Act, and
               each director of the  Company shall have the same  rights to
               contribution as  the Company,  subject in  each case  to the
               applicable terms  and conditions of this  paragraph (d). The
               obligations   of  the   Initial  Purchasers   to  contribute
               hereunder  are  several in  proportion  to their  respective
               obligations and not joint.
          11.  Termination.  This Agreement shall be subject to termination
               ------------
          in the absolute  discretion of the Initial  Purchasers, by notice
          given to  the Company  prior to delivery  of and payment  for the
          Securities,  if prior to such  time (i) trading  in the Company's
          Common Stock shall have  been suspended by the Commission  or the
          New York Stock Exchange or trading in securities generally on the
          New York Stock Exchange  shall have been suspended or  limited or
          minimum prices shall have been established on such Exchange; (ii)
          a  banking moratorium  shall    have  been declared  by  Federal,
          Wisconsin  or New  York State  authorities; or (iii)  there shall
          have  occurred  any   outbreak  or  escalation  of   hostilities,
          declaration by the United  States of a national emergency  or war
          or  other calamity  or crisis  the effect  of which  on financial
          markets  is such as  to make it,  in the judgment  of the Initial
          Purchasers,  impracticable or  inadvisable  to proceed  with  the
          offering or  delivery of  the Securities  as contemplated  by the
          Offering Memorandum.
          12.  Representations and Indemnities to Survive.  The respective
               -------------------------------------------
          agreements,  representations,  warranties, indemnities  and other
          statements  of the  Company or  its officers  and of  the Initial
          Purchasers  set forth in or made pursuant to this Agreement shall
          remain in full  force and effect, regardless of any investigation
          made  by or on behalf of any  Initial Purchaser or the Company or
          any of the officers, directors or controlling persons referred to
          in Section 10 hereof,  and shall survive delivery of  and payment
          for  the Securities. The provisions  of Sections 9  and 10 hereof
          shall survive the  termination or cancellation of this Agreement.
          13.  Notices.  All communications  hereunder shall be in  writing
               --------
          and   effective only  on  receipt, and,  if  sent to  an  Initial
          Purchaser,   will  be   mailed,   delivered   or   electronically
          transmitted  and   confirmed,  to such  Initial Purchaser  at the
          address  set forth above;  or, if sent  to the  Company, shall be
          mailed, delivered or  electronically transmitted it  at ▇▇▇  ▇▇▇▇
          ▇▇▇▇▇▇▇▇▇▇ ▇▇▇▇▇▇, ▇▇▇▇▇▇▇, ▇▇▇▇▇▇▇▇▇ ▇▇▇▇▇-▇▇▇▇;  attention
          of                    .
            --------------------
          14.  Successors.  This Agreement shall inure to the benefit of
               -----------
          and  be binding  upon  the parties  hereto  and their  respective
          successors. Nothing  expressed or mentioned in  this Agreement is
          intended  or shall  be  construed to  give  any person,  firm  or
          corporation, other  than the parties hereto  and their respective
          successors and the  controlling persons,  directors and  officers
          referred to in Section  10, any legal or equitable  right, remedy
          or claim under or in respect  of this Agreement or any  provision
          herein    contained;  this  Agreement  and  all  conditions   and
          provisions  hereof  being intended to be  and being for the  sole
          and exclusive benefit of the parties hereto and  their respective
          successors and said  controlling persons, directors  and officers
          and for the benefit of no other person, firm or corporation.
               No purchaser of  any Securities from  any Initial  Purchaser
          shall be  deemed  to be  a  successor by  reason merely  of  such
          purchase.
          15.  Applicable  Law.  The  rights and duties of the parties
               ----------------
          hereto under this  Agreement shall, pursuant to New  York General
          Obligations Law Section  5-1401, be  governed by the  law of  the
          State of New York.
          16.  Counterparts.  This Agreement may be executed in any number
               -------------
          of  counterparts  and by  different  parties  hereto on  separate
          counterparts,  each   such  counterpart,  when  so  executed  and
          delivered, shall  be deemed to  be an original,  and all of  such
          counterparts shall,  taken together, constitute one  and the same
          agreement.
               By signature  below  in the  space provided  below for  that
          purpose,  each Initial  Purchaser  indicates  acceptance  hereof,
          whereupon this  letter and acceptance shall  constitute a binding
          agreement between the Company and the several Initial  Purchasers
          in accordance with its terms.
                                        Very truly yours,
                                        ALLIANT ENERGY CORPORATION
                                        By:
                                           --------------------------------
                                             Name:
                                             Title:
          Accepted and delivered as of
          the date first above written
          [Names of Initial Purchasers]
          By:
             -------------------------------
               Name:
               Title:
                                                                 Schedule I
                                                                 ----------
                              Alliant Energy Corporation
                             % Series   Senior Notes due
                        -----         -                  ----
                                         Principal Amount
          Initial Purchaser                 Securities
          -----------------                 ----------
                              . . . . .  $
          -------------------             -----------
                              . . . . .  $
          --------------------            -----------
                                         $
               TOTAL  . . . . . . . . .  ============