Infrared Spectra and Metal-Ligand Force Constants in Coordination Compounds
Infrared spectra of metal complexes have already been intensively studied and the effects of a metal ion on the vibration frequencies in the ligand have been investigated (1). However, not so many investigations have been reported for the metal-ligand stretching and deformation vibrations. Recently we have measured the low frequency infrared spectra of ammine, halogeno, nitro, cyano, aquo and isothiocyanato complex ions. The assignments of the bands observed have been made on the basis of a normal coordinate analysis and the force constants associated with the metal-ligand bonds have been obtained. The results may be useful for the understanding of the nature of the metalligand bonds and give further information on the already recognized tendencies of electrons (2). The present paper is a summary of the results of our study.
KeywordsInfrared Spectrum Force Constant Coordination Chemistry Coordination Bond Normal Coordinate Analysis
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