Relativity of Hexachloroplatinate(IV) in Alkaline Medium: Influence of Ionic strength, Dielectric Constant and Temperature on the Reaction

Abstract

The reactivity of hexachloroplatinate(IV) in alkaline medium wasstudied in the temperature range 308-323 K. The reaction is first orderwith respect to [PtCl₆^2- ] and [OH^- ]. The rate increases with the increasein dielectric constant as well as ionic strength of the medium. The valuesof  ΔH^≠ and  ΔS^≠ are 34 ± 4 kJ mol^-1 and -195 ± 14 J K^-1 respectively. Thereaction appears to proceed through the replacement of CI^- in the coordinationsphere of hexachloroplatinate(IV) by OH^- to give products.