Halogen Scrambling in Pt (II) Substitution Reaction; A 19F and 31P NMR Study

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19F and 31P NMR measurements show that complexes of the type [Pt Cl3-x Brx (PF3-n Brn)](x=0.12,,n=0.1)) are formed on addition of bromide to K[Pt Cl3 (PF3)] in dichloromethane solution. Statistical scrambling of chlorine/ bromine occur in these complexes at 25°C. [PtCI3 (PF3)] undergoes preferential intermolecular CI/Br exchange at sites vyhich is not trans to phosphine ligand.

Pt(ll) substitution; scrambling