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首页> 外文期刊>Chemical Physics Letters >Kinetic study of the reaction of chlorine atoms with bromomethane and D-bromomethane in the gas phase
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Kinetic study of the reaction of chlorine atoms with bromomethane and D-bromomethane in the gas phase

机译：气相中氯原子与溴甲烷和D-溴甲烷反应的动力学研究

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摘要

The kinetics of the gas-phase reactions of chlorine atoms with bromomethane CH3Br and D-bromomethane CD3Br was studied experimentally. The relative rate method was applied using Cl + CH4 as the reference reaction. The rate constants for H-abstraction from CH3Br (kH) and D-abstraction from CD3Br (kD) were measured in the temperature range of 298–527 K and at a total pressure of 100 Torr. The temperature dependencies of the rate constants are described by the expressions: kH = (1.43 ± 0.22) 1011 exp(1040 ± 30/T) and kD = (1.36 ± 0.31)1011 exp(1595 ± 30/T) cm3 molecule1 s1. The kinetic isotope effect, described by the ratio kH/kD, was found to be (1.07 ± 0.14) exp(555 ± 20/T).
机译：实验研究了氯原子与溴甲烷CH3Br和D-溴甲烷CD3Br气相反应的动力学。使用Cl + CH4作为参考反应，采用相对速率法。在298–527 K的温度范围内，总压力为100 Torr的情况下，测量了从CH3Br吸收H的速率常数（kH）和从CD3Br吸收D的速率常数（kD）。速率常数的温度依赖性由以下表达式描述：kH =（1.43±0.22）1011 exp（1040±30 / T）和kD =（1.36±0.31）1011 exp（1595±30 / T）cm3分子1 s1。发现动力学同位素效应用比率kH / kD表示为（1.07±0.14）exp（555±20 / T）。

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