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Raman spectra and normal coordinate analysis of the copper(II) and copper(III) complexes of biuret and oxamide

Authors
Journal
Spectrochimica Acta Part A Molecular Spectroscopy
0584-8539
Publisher
Elsevier
Publication Date
Volume
36
Issue
8
Identifiers
DOI: 10.1016/0584-8539(80)80070-5

Abstract

Abstract The i.r. and Raman spectra of the N-coordinated copper(II)— and copper(III)—bis(biuretato) and —bis(oxamidato) complexes have been recorded, and normal coordinate analyses have yielded a Urey—Bradley force field for the Cu(III) complexes. The biuret system undergoes little change on oxidation, characterized by ring tightening and a general increase in mode frequencies. On oxidation, the oxamide system undergoes more drastic structural changes, most notably a strengthening of the CC bond in the oxamide rings, as shown by a 19% increase in K(CC), and an increase in electron density in the OCCO framework.

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