Kinetic effects of anionic ligands in some reactions of palladium(II) complexes

Abstract

The kinetics of the opening of the chelate ring in complexes of the type [Pd(PhS–CH₂·CH₂–SPh)X₂](X = Cl, I, Br, SCN, or N₃) by amines have been followed in 1,2-dimethoxyethane at 25 °C. The anomalous cis-effect sequence of anionic ligands, which was observed previously in systems containing sulphides and attributed to a stereoelectronic hindrance, almost disappears as far as the present series of ligands is concerned. This supports the previous interpretation.