Kinetics and mechanism of reaction of platinum(II) complexes. Part 1. Ethene and tetrachloroplatinate(II)

Abstract

The kinetics have been investigated of the reaction of ethene with [PtCl₄]^2–, [PtCl₃(OH₂)]^–, and [PtCl₂(OH₂)₂] in equilibrium in water at 25.0 °C, giving second-order rate constants of (2.06 ± 0.06)× 10^–3, (9.1 ± 1.1)× 10^–3, and (8.3 ± 3.0)× 10^–3 dm³ mol^–1 s^–1 respectively. The overall reaction is irreversible and the products are monoplatinum mono-olefin complexes such as [PtCl₃(C₂H₄)]^– and [PtCl₂(C₂H₄)(OH₂)]. The validity of the assumption of steady-state conditions has been investigated and found in this instance to be justified.