首页> 外文期刊>The journal of physical chemistry, A. Molecules, spectroscopy, kinetics, environment, & general theory >Computational Studies on Metathetical and Redox Processes of HOCl in the Gas Phase. 1. Reactions with H, O, HO, and HO2
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Computational Studies on Metathetical and Redox Processes of HOCl in the Gas Phase. 1. Reactions with H, O, HO, and HO2

机译:气相HOCl的复分解和氧化还原过程的计算研究。 1.与H,O,HO和HO2的反应

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The potential energy surfaces of four reactions including (a) HOCl + H, (b) HOCl + O, (c) HOCl + HO, (d) HOCl + HO2, have been studied by the CCSD(T)/aug-cc-pVTZ//CCSD/aug-cc-pVDZ, CCSD(T)/aug-ccpVTZ//CCSD/cc-pVDZ, and CCSD(T)/6-311+G(3df,2p)//BH&HLYP/6-311+G(3df,2p) levels of theory. For both HOCl + H and HOCl + O, the direct Cl-abstraction channels take place via the lowest energy barriers; for both HOCl + HO and HOCl + HO2, the lowest energy barrier channels are the indirect H-abstraction reactions by HOx (x ) 1, 2) via long-lived reaction intermediates. The rate constants for the low barrier channels have been calculated in the temperature range 200-3000 K by statistical theory. The predicted rate constants for HOCl + H and HOCl + HO are in good agreement with experimental results whereas that for HOCl + O was found to be in disagreement with the majority of available experimental data, suggesting a need for further improvement in theory and/or experiment.
机译:CCSD(T)/ aug-cc-已研究了包括(a)HOCl + H,(b)HOCl + O,(c)HOCl + HO,(d)HOCl + HO2)四个反应的势能面。 pVTZ // CCSD / aug-cc-pVDZ,CCSD(T)/ aug-ccpVTZ // CCSD / cc-pVDZ和CCSD(T)/ 6-311 + G(3df,2p)// BH&HLYP / 6-311 + G(3df,2p)的理论水平。对于HOCl + H和HOCl + O而言,直接的Cl吸收通道都是通过最低的能垒形成的。对于HOCl + HO和HOCl + HO2而言,最低的能垒通道是HOx(x)1、2)通过长寿命的反应中间体进行的间接H吸收反应。根据统计理论,已在200-3000 K的温度范围内计算了低势垒通道的速率常数。 HOCl + H和HOCl + HO的预测速率常数与实验结果非常吻合,而HOCl + O的预测速率常数与大多数可用的实验数据不一致,这表明需要进一步改进理论和/或实验。

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