Hydrido(methyl)carbene Complex of Platinum(IV)

Abstract

A hydrido(methyl)(carbene)platinum(IV) complex, using a stabilized Arduengo carbene, has been formed and characterized at low temperature by NMR. The electron-rich carbene complex [PtMe2{C3H2N2(CH2-2-py)2}] reacts with MeX (X = I or CF3SO3) to give [PtMe3{C3H2N2(CH2-2-py)2}]X and is protonated at low temperature to give [PtHMe2{C3H2N2(CH2-2-py)2}]X, X = CF3SO3, BF4, or CF3CO2. At room temperature [PtHMe2{C3H2N2(CH2-2-py)2}]+ undergoes irreversible reductive elimination of methane and dimerizes to give a binuclear bis{methyl(carbene)platinum(II)} complex cation [Pt2Me2{C3H2N2(CH2-2-py)2}2]2+.