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Mechanism and kinetics of the atmospheric reaction of 1,3,5-trimethylbenzene bicyclic peroxy radical with OH

机译:1,3,5-三甲基苯的大气反应机理和动力学与哦

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The bicyclic peroxy radical (BPR) is the key intermediate during atmospheric oxidation of aromatics. In this paper, the reaction mechanisms and kinetics of the atmospheric reaction of the 1,3,5-trimethylbenzene (1,3,5-TMB) BPR with the OH radical were studied by density functional theory (DFT) and conventional transition-state theory (CTST) calculations. The product channels of formation of the 1,3,5-TMB trioxide (ROOOH), OH-adducts and Criegee intermediate (CI) have been identified, and the geometries and energies of all the stationary points were calculated at the M08-HX/6-311 + g(2df,2p) level of theory. In addition, the rate constants for the individual reaction pathway at 298 K were calculated. The results showed that OH addition reactions including the formation of ROOOH and OH-adducts are the main pathways, whereas Criegee intermediate formation is of minor importance.
机译:双环过氧自由基(BPR)是芳烃大气氧化期间的关键中间体。 本文采用密度泛函理论(DFT)和常规转变状态研究了1,3,5-三甲基苯(1,3,5-TMB)BPR的大气反应的反应机理和动力学 理论(CTST)计算。 已经确定了1,3,5-TMB三氧化物(roOOH),OH-加合物和Criegee中间(CI)的形成的产物通道,并且在M08-HX /中计算了所有固定点的几何和能量。 6-311 + g(2df,2p)理论水平。 此外,计算了298 k下的各种反应途径的速率常数。 结果表明,在罗布赫和OH-加合物中的ob加法反应是主要途径,而Criuegee中间形成具有较小的重要性。

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    《RSC Advances》 |2019年第56期|共7页
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  • 正文语种 eng
  • 中图分类 化学;
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