Elsevier

Inorganica Chimica Acta

Volume 9, 1974, Pages 165-170
Inorganica Chimica Acta

Cobalt-bisdipyridyl-nitrosyl complexes. A case of reversible redox addtion

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Abstract

Cobalt(II)-bisdipyridyl complexes in presence of halide or nitrite ions react with nitric oxide with formation of [Co(dipy)2XNO]Y (X = halide or nitrite ion, Y = ClO4, PF6). On the basis of infrared spectra, polarographic and magnetic behaviour it is assumed that the complexes contain the nitrosyl group in the NO form. In solution, a reversible equilibrium CoIIINO⇌CoII + NO is established most probably via a CoIINO• species. Under mild conditions, the coordinated nitrosyl group is oxidized irreversibly to NO2. Structural factors determining the observed behaviour are discussed.

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