Spectroscopic investigations of molten salt systems. Theory and experiment

Abstract

The properties of coordination compounds in melts - species of quasi-binuclear (cluster) heteronuclear structure - are considered in terms of a proposed complex-cluster structural model for molten salt systems with complex formation. Their electronic structure and IR, Raman, ESR and NMR spectra are discussed as a cluster approximation, which allows not only for the near ligand-environment of the central complexing ion but also for the far outer-sphere-ion environment. Such an approach is of great importance for the theoretical and experimental chemistry (and physics) of complexes in a condensed phase in general and in molten salts in particular since it is with systems in the phase states such as crystals, melts and solutions that coordination chemistry operates in most real cases. Experimental examples of electronic, vibrational and radiospectral characteristics of molten salts are given, which confirm the fruitfulness of such a theoretical approach. © 1987 IUPAC