The magnetism and spectra of some octahedral vanadium(III) complexes

Abstract

The magnetic susceptibilities in the temperature range 80–300°K and ultraviolet and visible spectra of sixteen hexaco-ordinated complexes of vanadium(III) have been measured. Spectral data are consistent with octahedral formulations. The magnetic data are compared with the theory for a ³T_1g ground term perturbed by spin–orbit coupling, ligand field components of axial symmetry, and an orbital reduction factor. Values of the parameter A for a wide range of ligands are shown to be rather similar. The splitting of the ground term due to asymmetry of the ligand field varies from 150–300 cm.^–1 for MX₆ complexes to 500–1000 cm.^–1 for complexes with dissimilar ligands or three bidentate ligands.