Electron transfer reactions of halothane-derived peroxyl free radicals, CF3CHClO2˙: measurement of absolute rate constants by pulse radiolysis
Electron transfer reactions of halothane-derived peroxyl free radicals, CF3CHClO2˙: measurement of absolute rate constants by pulse radiolysis
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氟烷衍生的过氧化自由基 CF3CHClO2˙ 的电子转移反应：通过脉冲辐射分解测量绝对速率常数
DOI：
10.1039/p29830001133
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发表时间：
1983
期刊：
影响因子：
--
通讯作者：
R. Willson
中科院分区：
文献类型：
--
作者：
J. Mönig;K. Asmus;M. Schaeffer;T. Slater;R. Willson
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The halothane-derived peroxyl radical CF3CHClO2˙ has been generated in aqueous solutions by pulse radiolysis. Absolute rate constants for the reduction of halothane (2-bromo-2-chloro-1,1,1-trifluorethane) by hydrated electrons, hydrogen atoms, and propan-2-ol free radicals have been determined to be k 1.4 × 1010,3.8 × 108, and 7.6 × 107 l mol–1 s–1, respectively. The predominant product radical CF3ĊHCl rapidly adds O2, and an estimate of k 1.3 × 109 l mol–1 s–1, has been obtained for the absolute rate constant of this reaction. The resulting peroxyl radical CF3CHClO2˙ has been found to react rapidly with a variety of nucleophilic compounds such as 2,2′-azinobis(3-ethylbenzthiazoline-6-sulphonate), the phenothiazines promethazine, chlorpromazine, and metiazinic acid, the vitamins C and E, and propyl gallate. The absolute rate constants for these reactions are found to be generally lower than for corresponding reactions of the carbon tetrachloride-derived radical, CCl3O2˙.