Electron emission spectroscopic studies of olefin and other complexes of d 8 and d 10 metal ions

Abstract

Metal and ligand non-valence electron ionisation energies are reported for a number of complexes of Pt^O, Rh^I, and Ir^I with olefins, substituted olefins, oxygen and other unsaturated ligands. The constancy and magnitude of the metal binding energies in (Ph₃P)₂Pt(C₂R₄) and (Ph₃P)₂Rh(C₂R₄)Cl, in contrast to the significant variations observed in Ir(CO)(PPh₃)₂XY (X = Cl or I; Y = olefin, CO, O₂, or NO⁺, BF₄ ^–) is related to the strong π-basicity of the (Ph₃P)₂Pt and (Ph₃P)₂RhCl moieties. Crystallographic and thermodynamic data on some of the complexes are discussed together with observed C(1s) satellite peaks.