Garribba, Eugenio and Micera, Giovanni and Panzanelli, Angelo and Sanna, Daniele (2003) Electronic structure of oxovanadium(IV) complexes of alpha-hydroxycarboxylic acids. Inorganic Chemistry, Vol. 42 (13), p. 3981-3987. eISSN 1520-510X. Article.
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A series of VIVO bis chelated complexes of α-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 α-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.
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