Platinum(II) Complexes Containing Quaternized Nitrogen Ligands: Synthesis, Stability, and Evaluation as Catalysts for Methane and Benzene H/D Exchange

Abstract

This paper describes an efficient synthesis of the cationic platinum complex [( N -CH 3 -bpym)PtCl 2 ] + ( N -CH 3 -bpym = N -methylbipyrimidinium) and evaluation of its catalytic activity in H/D exchange reactions of CH 4 (with D 2 SO 4 ) and benzene (with CF 3 CO 2 D). With both substrates [( N -CH 3 -bpym)PtCl 2 ] + shows C−H activation reactivity comparable to that of its neutral analogue (bpym)PtCl 2 (bpym = bipyrimidine). The origin of this similar reactivity is proposed to be the in situ formation of the same active catalyst in both cases.