JOURNAL OF T H E A M E R I C A N CHEMICAL
SOCIETY
EDITOR MARTIN STILES BOARD OF EDITORS THOMAS M. DUNN, Deputy Editor DOUGLAS Ε. APPLEQUIST JACK HALPERN EMIL THOMAS KAISER PETER
ROBERT G. PARR ROBERT W. PARRY B. S. RABINOVITCH BARRY M. TROST
A. S. SMITH, Book Review Editor
EDITORIAL ADVISORY BOARD CARL H. BRUBAKER, JR. JOHN M. BUCHANAN GEORGE BÜCHI BENJAMIN P. DAILEY CARL DJERASSI
PHILIP J. ELVING PETER R. GIRARDOT GORDON G. HAMMES GEORGE S. HAMMOND JAMES L. HOARD
Published by the AMERICAN CHEMICAL SOCIETY 1155 16th Street, N.W. Washington, D. C. 20036 BOOKS AND JOURNALS DIVISION JOHN Κ CRUM RUTH REYNARD
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CHARLES R. BERTSCH
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KLAUS HOFMANN ROBERT Ε. IRELAND WILLIAM P. JENCKS MARTIN KARPLUS
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©Copyright, 1973, by the American Chemical Society. Published biweekly by the American Chemical Society at 20th and Northampton Sts., Easton, Pa. 18042. Second-class postage paid at Washington, D. C , and at additional mailing offices.
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Notice to Authors last printed in the issue of April 4, 1973 4A
Journal of the American Chemical Society / 94:14 / July 11, 1973
GLEN A. RUSSELL PAUL V. R. SCHLEYER FRANZ SONDHEIMER ROBERT ULLMAN EDEL WASSERMAN