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- W2071634911 abstract "Using 17O and 1H NMR, peroxotitanium species formed in the reaction of TiO(acac)2 and Ti(OEt)4 with H2O2 in CHCl3 were characterized. Dinuclear μ-oxo, μ-peroxo complex [Ti(acac)2]2O(O2) was prepared via reaction of TiO(acac)2 with H2O2 in CHCl3. This complex is inert towards alkenes oxidation. When Ti(OEt)4 reacts with an equimolar amount of 95% H2O2 in CHCl3 at 293 K, ca. 75% of the initial titanium complex converts to the oligomeric peroxotitanium species, containing no alkoxo ligands, ca. 20% of titanium exists in solution in the form of dinuclear μ-oxo, μ-peroxo complexes of the type [Ti(OEt)2L2]2O(O2), where L is solvent or EtOH, and 3–5% in the form of mononuclear peroxo complexes of the type Ti(O2)(OEt)2L2. Oligomeric and dinuclear peroxotitanium species were inert towards alkenes and phenol; in contrast mononuclear ones oxidize cyclohexene at 293 K predominantly into cyclohexene oxide and phenol into a 1:3 catechol/hydroquinone mixture. Peroxo complex Ti(O2)(OEt)2L2 is the first peroxotitanium complex active towards oxidation of organic substrates." @default.
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- W2071634911 date "1996-04-01" @default.
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- W2071634911 title "Nature of the reactive intermediates from the titanium-induced activation of hydrogen peroxide: Studies using 1H and 17O NMR" @default.
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- W2071634911 doi "https://doi.org/10.1016/1381-1169(95)00278-2" @default.
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