Bulletin of the Chemical Society of Japan
Online ISSN : 1348-0634
Print ISSN : 0009-2673
ISSN-L : 0009-2673
Preparation and Properties of the Mixed Dinitro Complexes of Cobalt(III) with the Carbonato or Oxalato Ligand
Hiroyasu IchikawaMuraji Shibata
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1969 Volume 42 Issue 10 Pages 2873-2877

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Abstract

Three new tervalent dinitro complexes of cobalt(III) have been prepared by the use of a tricarbonatocobaltate(III) solution or a similar solution as the starting material. These complexes, [Co(NO2)2(CO3)3]3−, [Co(NO2)2(OX)2]3− and [Co(NO2)2CO3OX]3− are characterized by their absorption spectra in solution. The geometrical structures of these complexes have been determined as of the cis-form on the basis of their IR spectra. The compounds were not stable against decomposition in aqueous solutions: the bis(oxalato) compound was most unstable against the decomposition to the Co(II) state. The stability has been discussed in connection with the specific absorption band of the coordinated NO2 ligand.

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