Electrochemical oxidation of organometallic complexes. Carbene and Lewis base complexes of chromium, molybdenum, and tungsten carbonyls

摘要: Tha oxidative one-electron transfer reactions of a wide variety Group VI metal carbonyl derivatives have been detected by voltammetry. The compounds studied are the type M(CO)6 –nLn or – 2n(LL)n(M = Cr, Mo, W; L monodentate Lewis base, n= 1 2; LL bidentate 2) and carbene complexes M(CO)5C(X)Y. value potential, E½, is influenced each variables M, L(or LL), n, X, Y. order E½-values follows closely apparent π-acceptor/σ-donor ratio ligand, but comparison with results molecular orbital calculations suggests that influence (or {C(X)Y}) upon redox indirect. Steric effects shown to especially where ligands present. oxidation potentials related synthetic chemistry in these systems.