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- W2070213990 abstract "Mechanistic predictions, based upon the assumption that free •OH and •NO2 radicals are formed as intermediates during the ONOOH decay, were tested using inorganic radical scavengers. Both the rates and the yields of Fe(CN)64- and IrCl63- oxidation by ONOOH were independent of their concentrations in submillimolar range. A 55 ± 7% Fe(CN)63- yield and 25 ± 3% IrCl62- were measured at pH 5.7, 22 °C. A yields ratio close to 2 is expected, because, of the two radicals produced, only •OH can rapidly oxidize IrCl63-. The competition kinetic studies demonstrated that the relative reactivities of the oxidizing intermediate generated by ONOOH toward IrCl63- and NO2- were identical with the reactivities of the “authentic” •OH radical generated by pulse radiolysis. It is concluded that ONOOH decomposes via its peroxo bond homolysis producing a pair of discrete •OH and •NO2 radicals with 28 ± 4% yield. A bimolecular reaction between ONOOH and Fe(CN)64- with the rate constant (8.2 ± 0.4) M-1 s-1 significantly increases both oxidation yield and rate at high [Fe(CN)64-]." @default.
- W2070213990 created "2016-06-24" @default.
- W2070213990 creator A5007307555 @default.
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- W2070213990 date "1999-08-25" @default.
- W2070213990 modified "2023-09-23" @default.
- W2070213990 title "The Yield of Hydroxyl Radical from the Decomposition of Peroxynitrous Acid" @default.
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- W2070213990 doi "https://doi.org/10.1021/ic990384y" @default.
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