Halogen exchange in platinum(IV) complexes

Abstract

³¹ P N.m.r. spectra show that addition of an equimolar amount either of bromine to trans-[PtCl₂(PR₃)L](R = Et, L = py, 3,5-Me₂-py, 4-Bu^t-py, PEt₃; R = Buⁿ, L = py)(py = pyridine) or of trans-[PtCl₄(PEt₃)(py)] to trans-[PtBr₄(PEt₃)(py)] results in halogen scrambling and gives an approximately statistical distribution of trans-[PtBr_xCl_4–x(PEt₃)L](x= 0–4).