COMPORTEMENT DE LA LIAISON Co-C DANS UNE SERIE DE COMPLEXES MODELES ALKYLES DU COBALT: MeCo(Chel)*B EN PRESENCE DE MeSnCl3 OU DE Me2SnCl2

Article abstract of DOI:10.1016/S0022-328X(00)99833-4

The behaviour of systems involving tin derivatives MeSnCl3 or Me2SnCl2 with a series of model vitamin B₁₂ complexes MeCo(Chel)*B (with Chel=DMG, BAE, BAE(CF3), BAE(CF3)2, Salen, AESalen, AEHap, (Do)(Doh), TIM) was investigated through 1H and 13C NMR, EPR, VPC, and polarographic measurements.Consideration of the reduction potentials E_1/2(Co^III -> Co^II) shows that the behaviour of the Co-C bond (cleavage, dinuclear adduct formation (Co, Sn), no reaction) is mainly influenced by the electron donor ability of the equatorial ligand and by the nature of the tin centre.