Entry to alkynylplatinum(IV) chemistry using hypervalent iodine(III) reagents, and the synthesis of triphenyl{4,4′-bis(tert-butyl)-2,2′-bipyridine}iodoplatinum(IV)

The reaction of phenyl(alkynyl)iodine(III) triflates with diorganoplatinum(II) complexes provides a general route for the synthesis of a new class of alkynylplatinum(IV) complexes containing Pt IV R 2 (CCR 2 ) groups, e.g., the 4,4 ′ -bis( tert -butyl)-2,2 ′ -bipyridine complexes PtIR 2 (CCSiMe 3 )(Bu t 2 bpy) (R=Me, Ph); IPh 2 (OTf) reacts with PtPh 2 (Bu t 2 bpy) to form the first archetypal triarylplatinum(IV) complex PtIPh 3 (Bu t 2 bpy).