ChemInform Abstract: Determination of the Oxidation State in Vanadium Complexes Using V‐K Absorption Spectra.

Abstract

256ChemInform Abstract The compounds resulting from the reaction of VOSO4 with 8-quinolinols in air are characterized by magnetic moments and V-K absorption spectra. (Ia) and its Mannich derivative (Ib) (and also the corresponding pyridyl derivative) form V(V) complexes. The oxovanadium(IV) compound of (Ic) initially formed is not very stable in solution and tends to oxidize. Only the oxovanadium(IV) complex of (Id) hasa good stability corresponding to that of β-diketone compounds.