Abstract
The addition of hydrogen peroxide to vanadium (V) precursors in aqueous acidic solutions leads to the formation of a cationic monoperoxospecies [VO(O 2)] + and an anionic diperoxocomplex [VO(O 2) 2] −, depending on the pH and on the excess of H 2O 2. The latter may undergo protonation to form the neutral complex [HVO(O 2) 2]. 51V-NMR data and ab initio calculations suggest that the neutral complex is formed via protonation of a peroxide oxygen and that in such a species, as well as in the other two peroxovanadium derivatives, the usual η 2 arrangement of the peroxo groups is maintained. The comparison of reactivity data of the three complexes in the self-decomposition reaction and in the oxidation of uracil, indicates that the neutral diperoxocomplex exhibits an oxidizing power considerably larger than that of the other two peroxovanadium species.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have