title: Electronic structure of oxovanadium IV complexes of alpha-hydroxycarboxylic acids.
abstract: A series of V(IV)O bis chelated complexes of alpha-hydroxycarboxylic acids with a 2(COO(-), O(-)) coordination set was analyzed by electronic absorption and EPR spectroscopy in aqueous solution. All the complexes exhibit a square-pyramidal geometry distorted toward trigonal bipyramid. The influence of the distortion of the geometry, as deduced from the steric hindrance produced by the substituents at the alpha-carbon atom of the ligands, on the spectroscopic parameters has been studied. The observed trends were related to the electronic structure of the metal ion in the distorted geometry.
authors.affiliation: Dipartimento di Chimica, Università degli Studi di Sassari, Via Vienna 2, 07100 Sassari, Italy. micera@uniss.it
authors.forename: Eugenio
authors.initials: E
authors.lastname: Garribba
authors.forename: Giovanni
authors.initials: G
authors.lastname: Micera
authors.forename: Angelo
authors.initials: A
authors.lastname: Panzanelli
authors.forename: Daniele
authors.initials: D
authors.lastname: Sanna