Recent Developments of FT-IR and Raman Spectroscopy in Coordination Chemistry

Abstract

The nature of the bond between a metal and an unsaturated hydrocarbon is one of the most fundamental and significant problems in coordination chemistry. In spite of wide structural and spectroscopic studies of olephinic π-complexes a number of fundamental spectroscopic properties have not been clearified yet. Reinvestigation of FT-IR and Raman spectra of K[Pt(C 2 H 4)Cl 3 ] and K[Pt(C 2 H 4)Cl 3 ].H 2 0 in both the solid phase and water/HCl solution suggests some modification of widely accepted assignments. Skeletal modes of [NBu 4 ][Pt(C 2 H 4)Br 3 ], [NBu 4 ][Pd(C 2 H 4)Cl 3 ] and their C 2 D 4 derivatives have been measured and assigned. A new model for the normal coordinate treatment of π-complexes has been adopted to calculate metal-ligand force constants. © 1989 IUPAC