A STUDY OF AN OXOVANADIUM(V) COMPLEX WITH A TRIDENTATE SCHIFF-BASE LIGAND

A tridentate dibasic Schiff base ligand with an ONO donor set reacts w ith (n-C4H9)(4)NVO3 in the presence of a small amount of acetic acid t o form a monomeric and five-coordinated oxovanadium(V) complex of the type [VO(L)(OCH2CH3)](H(2)L = N-benzoylacetone-m-Bromobenzoylhydrazone ). The title complex has been characterized by elemental analysis, IR, EPR, H-1 NMR, electronic absorption spectra and conductance measureme nts. The results of EPR spectrum and electronic absorption spectra con firm that the oxidation state of the vanadium is + 5. A biological eff ect of the ligand and its complex has been studied. The X-ray structur e analysis reveals that the coordination environment of the vanadium a tom is a square pyramid with the oxo-ligand occupying the apical posit ion.