C–C Bond Forming Reductive Elimination from Diarylplatinum Complexes Driven by Visible-Light-Mediated Photoredox Reactions

A series of dinuclear Pt(II) bis-aryl complexes with visible-light-absorbing Ir(III)–cyclometalate units were synthesized, and their molecular structure and photophysical and electrochemical properties were investigated. The dinuclear complexes underwent reductive elimination upon visible-light irradiation at ambient temperature to afford the corresponding biaryls. The photoredox process at the Ir center induces the oxidation of the Pt(II)–Ar2 center to [Pt–Ar2](III) to accelerate reductive elimination.