Gas-phase reaction kinetics of boron monohydride
Gas-phase reaction kinetics of boron monohydride
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一氢化硼的气相反应动力学
DOI：
10.1021/j100346a045
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发表时间：
1989
期刊：
影响因子：
--
通讯作者：
H. Nelson
中科院分区：
文献类型：
--
作者：
J. Rice;N. J. Caldwell;H. Nelson
(1.35±0.20）X10 - 10; H2O，（9.75±1.64）× 10 - 12; 02，（8.08±1.20）X 10 - 13; C02，（2.64±0.41）X 10 - 14; C3H8，（7.57±1.34）X 10 - 15; C2H4，（1.17±0.18）X 10 - 10;（CH3）2C= C（CH3）2，（1.87±0.30）X 10 - 10。指示的不确定度为±（2加上测量中的估计不确定度）。BH与CH_4反应的速率常数上限为10 ~（-16）cm ~ 3·s ~（-1）。BH与CO和H_2反应的速率常数与总压有关。对于BH+ H_2反应，我们观察到了大部分的衰减区，并能用Troe提出的表达式拟合数据，得到极限高压速率常数的估计值为（3.67±0.91）× 10 ~（13）cm ~ 3·s ~（-1）。对于BH与CO的反应，测得的速率常数不能外推到高压极限，因此使用过渡态理论RRKM方法建模。
(1.35±0.20) X10'10; H20,(9.75±1.64) X 10" 12; 02,(8.08±1.20) X 10" 13; C02,(2.64±0.41) X 10'14; C3H8,(7.57±1.34) X 10'15; C2H4,(1.17±0.18) X 10" 10;(CH3) 2C= C (CH3) 2,(1.87±0.30) X 10" 10. The indicated uncertainties are±(2 plus estimated uncertainties in the measurement). An upper limit of 10'16 cm3 s'1 is placed on the rate constant for reaction with CH4, The measured rate constants for the reaction of BH with CO and H2 show a dependence on total pressure. For the reaction BH+ H2, we observe a large portionof the falloff region and are able to fit the data using the expression developed by Troe, leading to an estimated value for the limiting high-pressure rate constant of (3.67±0.91) X 10'13 cm3 s'1. For the reaction of BH with CO, measured rate constants could not be extrapolated to the high-pressure limit and therefore were modeled by using a transition-state theory-RRKM approach.