Vanadium Bromoperoxidases Mimicking Systems: Bromohydrins Formation as Evidence of the Occurance of a Hypobromite-Like Vanadium Complex.

Article abstract of DOI:10.1016/0040-4039(95)00331-6

In the aqueous phase of a two-phase (H2O-CH2Cl2) system mimicking the hydrophilic and the hydrophobic portions of vanadium dependent bromoperoxidases, (V-BrPO), a mono peroxovanadium complex, formed in situ by addition of H2O2 to NH4VO3, oxidizes Br(-) to a species whose nature is still largely unknown.Such species displays a bromine-like reactivity toward organic substrates dissolved in CH2Cl2.The observation that styrene, 1-methyl- and 2-methyl styrenes afford, together with dibromo-compounds, appreciable amounts of bromohydrins, suggests that a hypobromite-like species also formed.Evidence is presented that such a species is a vanadium complex.