EDITOR J O S E P H F.
BUNNETT
ASSOCIATE
EDITORS
Joel E. Keizer J o h n E. M c M u r r y EDITORIAL ADVISORY
Published
BOARD
Ralph N. Adams
Jack Halpern
E v a L. M e n g e r
F r e d Basolo
Kendall N. Houk
K u r t Mislow
R. S t e p h e n B e r r y
Daniel E. Koshland, Jr.
J o h n C. P o l a n y i
Michel Boudart
Maurice M. Kreevoy
Alexander Rich
E d w a r d A. Collins
Ronald N. McElhaney
Anthony M. Trozzolo
J o h n T . Gerig
F r e d W. M c L a f f e r t y
G e n e G. W u b b e l s
by the
AMERICAN CHEMICAL SOCIETY BOOKS AND JOURNALS DIVISION D. H. Michael Bowen, Director Journals Department: Charles R. Bertsch, Head; Marianne C. Brogan, Associate Head Production Department: Elmer M. Pusey, Jr., Head Research and Development Department: Seldon W. Terrant, Head © Copyright, 1980, by the American Chemical Society. P e r m i s s i o n of the American Chemical Society is granted for libraries and other users to make reprographic copies for use beyond t h a t permitted by Section 107 or 108 of the U.S. Copyright Law, provided that the copying organization pay the appropriate per-copy fee through the Copyright Clearance Center, Inc., 21 Congress St., Salem, Mass. 01970. Educational institutions are generally granted permission to copy upon application to the Copyright Administrator, Books and Journals Division, at the ACS Washington address. 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. Editorial Information 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 concerned in large part with work in the author's own laboratory, providing that relevant contributions by other investigators are mentioned sufficiently to place the author's research in perspective. Articles should be directed concurrently to a general audience of research-minded
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