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CH_3O_2·+ClO气相反应的密度泛函理论研究 被引量:4

The DFT study of CH_3O_2·+OCl gas reaction
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摘要  用密度泛函方法在CCSD(T)/6-311++G //B3LYP/6-311G 水平上研究了气相反应CH3O2·+ClO的反应机理.得到了不同能量产物的可能的反应通道,获得反应势能面.整个反应过程为多通道反应,经过多个步骤完成,共找到7个中间体和10个过渡态,产物1CH3OCl+3O2(P1)和1CH2O+1HOOCl(P4)为能量较低产物,通道1a:R→IM1→TS1/3→IM3→P1,4a:R→IM1→TS1/P4→P4和4b:R→IM2→TS2/P4→P4为较为可行的反应通道. The mechanism of the CH_3O_2·+ClO reaction in gas phase has been studied at CCSD(T)/6-311++G^()//B3LYP/6-311G~ level by using density functional theory.The possible channel leading to the lowest-lying product CH_3OCl+O_2 and the potential energy surface have obtained.The results showed that the whole reaction comes through many courses,and ~1 CH_3OCl+~3O_2(P1)and ~1 CH_2O+~1 HOOCl(P4)are two lowest products.Among the reaction paths proposed,channels la:R→IM1→TS1/3→IM3→P1,4a:R→IM1→TS1/P4→P4 and 4b:R→IM2→TS2/P4→P4 are the probable paths.
出处 《分子科学学报》 CAS CSCD 2003年第4期191-197,共7页 Journal of Molecular Science
基金 国家自然科学基金资助项目(29892168)
关键词 CH3O2· CLO 气相反应 密度泛函理论 自由基 反应机理 大气臭氧层 反应动力学 CH_3O_2· radicals density functional theory reaction mechanism
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