EDITOR J O S E P H F. B U N N E T T ASSOCIATE EDITORS Bruce H. Mahan John E. McMurry EDITORIAL ADVISORY BOARD Fred Basolo
Harlyn O. Halvorson
Erwin Klingsberg
Jerome A. Berson
Harold Hart
Daniel E. Koshland, Jr.
Edward A. Collins M. A. El-Sayed John T. Gerig Jack Halpern
Published by the AMERICAN CHEMICAL SOCIETY 1155 16th Street, N.W. Washington, D.C. 20036 BOOKS A N D JOURNALS DIVISION John Κ Crum
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© Copyright, 1975, by the American Chemical Society. Published monthly 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. Accounts of Chemical Research publishes concise, critical reviews of research areas currently under active investigation. Most articles are written by scientists active in the area reviewed. Reviews may be con cerned in large part with work in the au thor's own laboratory, providing that rele vant contributions by other investigators are mentioned sufficiently to place the author's research in perspective.
Dudley R. Herschbach
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Roald Hoffmann
John A. Schellman
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Jean'ne M. Shreeve
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