The vibrational spectra of co-ordination compounds of formula trans-MX2Y2. Part III. Low-frequency vibrations of group VIII complexes where X = Cl, Br, and I, and Y = Me2S, Me2Se, and Me2Te

Abstract

Infrared and Raman spectra of solid samples of co-ordination compounds of formula trans-[MX₂Y₂] where M = Pd^II and Pt^II, X = Cl, Br, and I, and Y = Me₂S, Me₂Se, and Me₂Te have been recorded over the frequency range 100–500 cm.^–1. Assignments of fundamental modes to observed spectra are suggested. The frequencies of the vibrations of the relevant bonds suggest strongly that in bond order M–Cl > M–Br > M–I and M–S > M–Se < M–Te.