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Portionwise addition of hydrogen peroxide markedly augments enantioselectiv
ity of sulfide to sulfoxide oxidation catalyzed by vanadium (IV)-Shiff base
complexes, and this effect cannot be explained by temperature fluctuations
. V-51 NMR spectra of reaction mixture detect two chiral peroxo complexes a
nd one achiral diperoxo compound. (C) 2000 Elsevier Science B.V. All rights
reserved.