N.M.R. studies of aqua exchange on trimethylaquabipyridineplatinum(IV)

Abstract

Proton magnetic resonance spectroscopy has been used to study the exchange reaction which is responsible in aqueous solution for averaging the two methyl proton signals of trimethylaquabipyridineplatinum(1V) cation. The dependence of the rate upon cation concentration, pH, added sulphate ion, and temperature and the appearance of ¹⁹⁵Pt satellites in the 2,2'-bipyridine proton spectrum lead to the conclusion that the reaction being followed is exchange of a coordinated water ligand with the bulk solvent.