A kinetic study of the redistribution reaction of Me4-nPb[M(CO)5]n (M = Mn, Re; n = 1, 2; Me = CH3)

Article abstract of DOI:10.1016/S0020-1693(00)90485-7

In the system Me₄Pb/Me₃Pb[M(CO)₅]/Me₂Pb[M( CO)₅]₂ (Me = CH₃; M = Mn, Re) redistribution can occur. The single reactions involved, disproportionation of Me₃Pb[M(CO)₅] (M = Mn, Re) and conproportionation of Me₄Pb and Me₂Pb[Mn(CO)₅]₂ to Me₃Pb[Mn(CO)₅]₂ have been investigated kinetically by ¹H NMR spectroscopy in various solvents, and initial phase rate constants have been determined. Both types of reactions proceed according to a 2nd order rate law. Conproportionation is faster than Re compounds. The solvent dependency of the reaction can be explained when a reaction mechanism via a bridged transition state is assumed.