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• W1990382322 startingPage "2612" @default.
• W1990382322 abstract "Clear elucidation of the oxidative relationships of the active metal hydroperoxide moiety with its corresponding metal oxo and hydroxo intermediates would help the understanding of the different roles they may play in redox metalloenzymes and oxidation chemistry. Using an Mn(Me2EBC)Cl2 complex, it was found that, in t-butanol–water (4 : 1) with excess H2O2 at pH 1.5, the MnIV-OOH moiety may exist in the catalytic solution with a mass signal of m/z = 358.1, which provides a particular chance to investigate its oxidative properties. In catalytic oxidations, the MnIV-OOH moiety demonstrates a relatively poor activity in hydrogen abstraction from diphenyl methane and ethylbenzene with TOF of only 1.2 h−1 and 1.1 h−1 at 50 °C, whereas it can efficiently oxygenate diphenyl sulfide, methyl phenyl sulfide and benzyl phenyl sulfide with TOF of 13.8 h−1, 15.4 h−1 and 17.8 h−1, respectively. In mechanistic studies using H218O and H218O2, it was found that, in the MnIV-OOH moiety mediated hydrogen abstraction and sulfide oxygenations, the reaction proceeds by two parallel pathways: one by direct oxygen insertion/transfer, and the other by plausible electron transfer. Together with a good understanding of the corresponding manganese(IV) oxo and hydroxo intermediates, this work provides the first chance to compare the reactivity differences and similarities of the active metal oxo, hydroxo and hydroperoxide intermediates. The available evidence reveals that the MnIV-OOH moiety has a much more powerful oxidizing capability than the corresponding MnIVO and MnIV–OH functional groups in both hydrogen abstraction and oxygenation." @default.
• W1990382322 created "2016-06-24" @default.
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• W1990382322 date "2012-01-01" @default.
• W1990382322 modified "2023-10-18" @default.
• W1990382322 title "The oxidative properties of a manganese(iv) hydroperoxide moiety and its relationships with the corresponding manganese(iv) oxo and hydroxo moieties" @default.
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• W1990382322 doi "https://doi.org/10.1039/c2dt11814a" @default.
• W1990382322 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/22223076" @default.
• W1990382322 hasPublicationYear "2012" @default.
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