S-sulphinates of cobalt(III) planar chelates and sulphur dioxide insertion into a cobalt(III)-carbon bond

R. J. Cozens, G. B. Deacon, P. W. Felder, K. S. Murray, B. O. West

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The reactivity of the cobalt-carbon bond towards sulphur dioxide has been investigated in the compounds RCoIII(L)B where L = N, N’-ethylenebis(salicy1- aldiminato), N, N’-phenylenebis(salicylaldiminato), or bis(dimethylg1yoximato); B = water or pyridine. In the Schiff base complexes, for R = alkyl, insertion. into the cobalt-carbon bond proceeds smoothly to give the corresponding sulphinato derivatives. Reaction also occurs with methylcobaloxime and a pentafluorobenzenecobalt- Schiff base compound, but the products are not so well defined. There is no reaction with cobalt-aryl bonds for any of the chelates. The alkane- and arenesulphinato complexes can be synthesized by an alternative oxidative-addition reaction NaCOL+RSO2Cl or a replacement reaction XCoL+AgSO2R or NaSO2R (X = C1, I). The infrared spectra of the complexes show that the sulphinato group is bonded in the manner shown: (Formula Presented) The p.m.r. spectra of the complexes are discussed in some detail. Reactions of the sulphinato derivatives with donor molecules and the halogens are briefly described.

Original languageEnglish
Pages (from-to)481-489
Number of pages9
JournalAustralian Journal of Chemistry
Issue number3
Publication statusPublished - 1 Jan 1970

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