Kinetics of the Cross Reactions of CH<sub>3</sub>O<sub>2</sub> and C<sub>2</sub>H<sub>5</sub>O<sub>2</sub> Radicals with Selected Peroxy Radicals
作者:Eric Villenave、Robert Lesclaux
DOI:10.1021/jp960765m
日期:1996.1.1
be between the rate constants for the self-reactions of RO2 and CH3O2 (or C2H5O2). However, when the RO2 self-reaction is fast, the cross reaction with CH3O2 (or C2H5O2) is also fast, with similar rate constants for both reactions, suggesting that these particular peroxy radical cross reactions can play a significant role in the chemistry of hydrocarbon oxidation processes in the troposphere and in
使用两种技术研究了选定的过氧自由基(RO 2)与CH 3 O 2和与C 2 H 5 O 2的反应动力学:准分子激光光解法和常规闪速光解法,均与紫外吸收光谱法结合。在适当的烃存在下,通过分子氯的光解或通过适当的烷基氯的光解,产生自由基。除烯丙基过氧自由基与CH 3 O 2的反应外,所有此类交叉反应动力学均在760 Torr总压力和室温下进行。,对于将其291和423之间所确定的速率常数K,从而产生以下速率表达式: ķ 15 =(2.8±0.7)×10 -13 EXP [(515±75)/ Ť ]厘米3分子-1小号- 1。(2.0±0.5)×10 -13,(1.5±0.5)×10 -12,(9.0±0.15)×10 -14,<2.0×10 -12,(2.5±0.5)×10 -12,和CH 3 O 2的反应获得了(8.2±0.6)×10 -12(cm 3分子-1 s -1的单位)。具有C 2 H