EPR and Spectroscopic Studies of Bis(S-methyl-3-isopropylidenehydrazinecarbodithioato)-oxovanadium(IV) as Model Compound for Vanadium Bound to Nitrogen and Sulfur Heteroatoms

Abstract

The synthesis and spectroscopic and EPR characterization of a vanadyl complex with acetone Schiff base, bis(S-methyl-3-isopropylidenehydrazinecarbodithioato)orovanadium(IV), are described. The magnetic moment of 1.75 μ B at room temperature is close to the spin only magnetic moment (1-73 μ B ). The experimental values of g∥ = 1.960 and g⊥ = 1.988 and the normal occurence of ν (V=O) vibration suggest a monomeric five-coordinate square pyramical structure of the complex. A correlation was found between g∥ and A∥ of the title compound when compared with other model compounds of the vanadyl complexes in which possible combinations of four ligands may include all nitrogen (N 4 ) and all sulfur (S 4 ).