ELECTROSYNTHESIS, CHARACTERIZATION AND STUDIES OF REACTIVITY OF SOME HIGHLY PEROXYGENATED VANADIUM(V) COMPLEXES

Peroxo complexes of vanadium, viz. K[VO(O2)2(H2O)], K[V(O2)3].3H2O, LH 2[VO(O2)2L]2.6H2O, H[VO(O2)2L] (L = 2,2'-bipyridine or 1,10-phenanthro line) and K3[VO(O2)2(C2O4)].H2O have been synthesized electrochemicall y using a sacrificial vanadium anode in the presence of hydrogen perox ide. The heteroligand complexes were precipitated by the addition of t he ligands, while the others are precipitated out with ethanol after a djustment of pH. The compounds have also been prepared by the dissolut ion of the metal powder in hydrogen peroxide. They have been character ized by elemental analysis and vibrational spectra. Studies on the oxi dizing reactivity of some of the complexes towards various organic sub strates, viz. aniline, 1,4-dihydroxybenzene, o-cresol, triphenylphosph ine, triphenylarsine, etc. have been carried out.