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O r g a n i c Chemistry

THE JOURNAL OF

EDITOR-IN-CHIEF:

FREDERICK D. GREENE

Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts

02139

SENIOR EDITORS WERNER HERZ Florida State University Tallahassee, Florida

JAMES A. MOORE University of Delaware Newark, Delaware

ASSISTANT EDITOR:

MARTIN A. SCHWARTZ Florida State University Tallahassee, Florida

THEODORA W. GREENE

BOARD OF EDITORS STANTON EHRENSON ROBERT J. HIGHET

JOSEPH F. BUNNETT CLIFFORD A. BUNTON MICHAEL P. CAVA ORVILLE L. CHAPMAN GERHARD L. CLOSS CHARLES H. D E P U Y

RALPH HIRSCHMANN EARL S. HUYSER WALTER LWOWSKI

EX-OFFICIO MEMBERS:

JAMES A. MARSHALL JAMES C. MARTIN ROY A. OLOFSON LEO A. PAQUETTE HOWARD E. SIMMONS

ROBERT V. STEVENS EDWARD C. TAYLOR DAVID J. TRECKER BARRY M. TROST EDWIN F . ULLMAN EDGAR W. WARNHOFF

GEORGE H. COLEMAN, WayneStateUniversity

EDWARD M . BURGESS, Georgia Institute of Technology (Secretary-Treasurer of the Division of Organic Chemistry of the American Chemical Society)

Published by the AMERICAN CHEMICAL SOCIETY 1155 16th Street, N.W. Washington, D. C. 20036 BOOKS AND JOURNALS DIVISION JOHN Κ CRUM R U T H REYNARD

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Director

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Head,

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Journals

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Department

BACIL GUILEY

Head, Graphics and

Production Department SELDON W. TERRANT

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and Development Department ©Copyright, 1973, by the American Chemical Society. Published biweekly by the American Chemical Society at 20th and North­ ampton Sts., Easton, Pa. 18042. Second-class postage paid at Washing­ ton, D. C , and at additional mailing offices.

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Claims for missing numbers will not be allowed (1) if loss was due to failure of notice of change in address to be re­ Head, CHARLES R. BERTSCH; Produc­ ceived before the date specified, (2) if tion Editor, EILEEN SEGAL; Assistant received more than sixty days from Editor, FERN S. JACKSON; Editorial date of issue plus time normally re­ Assistant, ANDREW J. D'AMELIO. quired for postal delivery of journal and claim, or (3) if the reason for the Advertising Office: Centcom, Ltd., claim is "issue missing from files." 142 East Ave., Norwalk, Conn. 06851. Subscription rates for 1973: $20.00 The American Chemical Society and per volume to members of the ACS and the Editors of The Journal of Organic $60.00 per volume to all others. Chemistry assume no responsibility for Those interested in becoming members the statements and opinions advanced should write to the Admissions Depart­ by contributors. ment, American Chemical Society, 1155 16th St., N.W., Washington, B u s i n e s s and Subscription D. C. 20036. Add $5.00 per subscrip­ Information tion for Canada and countries belong­ ing to the Postal Union, and $6.00 for Send all new and renewal subscrip­ all other countries. tions with payment to Office of the Con­ Single copies for current year: troller, 1155 16th Street, N.W., Wash­ $3.00. Postage, single copies: to ington, D. C. 20036. Subscriptions Canada and countries in the Panshould be renewed promptly to avoid a American Union, $0.15; all other break in your series. All correspond­ countries, $0.20. Rates for back issues ence and telephone calls regarding from Volume 20 to date are available changes of address, claims for missing from the Special Issues Sales Depart­ issues, subscription service, the status ment, 1155 16thSt., N.W., Washington, of records, and accounts should be directed to Manager, Membership and D. C. 20036. Subscription Services, American Chem­ Subscriptions to this and the other ical Society, P.O. Box 3337, Columbus, ACS periodical publications are avail­ Ohio 43210. Telephone (614) 421- able on microfilm. Supplementary 7230. material not printed in this journal is now available in microfiche form on a On changes of address, include both current subscription basis. For in­ old and new addresses with ZIP code formation on microfilm or microfiche numbers, accompanied by mailing subscriptions, write Special Issues Sales label from a recent issue. Allow four Department at the address above. weeks for change to become effective.

Notice to Authors last printed in the issue of June 1, 1973