SPECTRA OF THE ZERO, ONE, AND TWO ELECTRON (OR HOLE) TRANSITION METAL CYANIDE COMPLEXES PART $II^{1}$.

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1962

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Ohio State University

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The magnetic and spectrosopic demeanor of cyano-transition metal compounds is discussed from the standpoint of the modern theory of ligand fields. It is emphasized that for such compounds the naive electrostatic crystal field theory is inapplicable, and the more general molecular orbital based crystal field theory (the so-called ligand field theory) is required to rationalize the existent experimental data. The equations which determine the spectral characteristics of zero, one, and two electron or hole cyanide compounds derived $before^{1}$ are applied to several newly characterized cyano-complexes, and the issuant experimental and theoretical consequences are critically discussed. The prospects for future progress in this area are commented upon, and the avenues of greatest promise are mapped. Hope is expressed that such progress will soon circumscribe the domain of applicability of simple ligand field techniques.$^{1}$ Part I. J. R. Perumareddi, A. W. Adamson, and A. D. Liehr, Symposium on Molecular Structure and Spectroscopy, The Ohio state University Columbus, Ohio, June 12-16, [96], paper H4.$^{2}$ Present address.

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Author Institution: Department of Chemistry, University of Southern California; Bell Telephone Laboratories, Inc., Murray Hill, New Jersey and Mellon Institute

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