ELUCIDATION OF V(III) COMPLEX COORDINATION NUMBERS BY ELECTRONIC-SPECTRA

The ligand field transitions in the optical and near-infrared spectra of V(III) complexes with aminopolycarboxylato ligands (edta, tmdta) ar e analyzed based on the angular overlap model (AOM) approach. Results from both solid state and solution spectra lead to an explanation of t he spectral differences between six- and seven-coordinate complexes, p articularly in the near-infrared region. Structural and electronic eff ects responsible for the preference to a certain geometrical arrangeme nt are discussed. (C) 1998 Elsevier Science Inc. All rights reserved.