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首页> 外文期刊>The journal of physical chemistry, A. Molecules, spectroscopy, kinetics, environment, & general theory >Temperature Dependence of the Rate Coefficients for the Reactions of Atomic Bromine with Toluene, Tetrahydrofuran, and Tetrahydropyran
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Temperature Dependence of the Rate Coefficients for the Reactions of Atomic Bromine with Toluene, Tetrahydrofuran, and Tetrahydropyran

机译：溴与甲苯，四氢呋喃和四氢吡喃反应的速率系数的温度依赖性

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摘要

The rate coefficients for the reactions of atomic bromine with toluene, tetrahydrofuran, and tetrahydropyran were measured from approximately 295 to 362 K using the relative rate method. Iso-octane was used as the reference compound for the reaction with toluene, and iso-octane and toluene were used as the reference compounds for the reaction with tetrahydrofuran; tetrahydrofuran was used as the reference compound for the reaction with tetrahydropyran. The rate coefficients were found to be unaffected by changes in pressure and oxygen concentration. The rate coefficient ratios were converted to absolute values using the absolute rate coefficient for the reaction of Br with the reference compound. The absolute rate coefficients, in the units cm' molecule ' s ', for the reaction of Br with toluene are given by k(T) = (3.7 ± 1.7) x 10~(-12) exp(-(1.63 ± 0.15) x 10~3/T), for the reaction of Br with tetrahydrofuran by k(7)= (3.7 ±2.7) x 10~(-10) exp(-(2.20 ± 0.22) x 10~3/T), and for the reaction of Br with tetrahydropyran by k(T) = (3.6 ± 1.8) x 10~(-10) exp(-(2.35 ± 0.16) x 10~3/T). The uncertainties represent one standard deviation. The Arrhenius parameters for these reactions are compared with results in the literature for dimethyl ether, diethyl ether, and a series of saturated hydrocarbons, and the effects of structural variation on these parameters are identified.
机译：使用相对速率法在约295至362 K范围内测量了原子溴与甲苯，四氢呋喃和四氢吡喃反应的速率系数。异辛烷用作与甲苯反应的参考化合物，异辛烷和甲苯用作与四氢呋喃反应的参考化合物。四氢呋喃用作与四氢吡喃反应的参考化合物。发现速率系数不受压力和氧气浓度变化的影响。使用Br与参考化合物反应的绝对速率系数将速率系数比率转换为绝对值。 Br与甲苯反应的绝对速率系数（单位cm'分子's'）由k（T）=（3.7±1.7）x 10〜（-12）exp（-（1.63±0.15）对于Br与四氢呋喃的反应，通过k（7）=（3.7±2.7）x 10〜（-10）exp（-（2.20±0.22）x 10〜3 / T）x和10〜3 / T）和对于Br与四氢吡喃的反应，k（T）＝（3.6±1.8）×10〜（-10）exp（-（2.35±0.16）×10〜3 / T）。不确定度代表一个标准偏差。将这些反应的Arrhenius参数与文献中有关二甲醚，二乙醚和一系列饱和烃的结果进行比较，并确定了结构变化对这些参数的影响。

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