Structure and redox behaviour of a paramagnetic Rh–Pt–Cu–Pt–Rh heterometallic-extended metal-atom chain

Abstract

A paramagnetic, pentanuclear, metal–metal bonded complex comprising three metals is isolated. The Cu d_x²−y² orbital of the Rh–Pt–Cu–Pt–Rh chain contains an unpaired electron. The close energetic levels and symmetric overlap of the Cu d_x²−y² and Rh–Pt δ* induces a charge-transfer reaction to achieve the diamagnetic Rh–Pt–Cu–Pt–Rh complex.