高等学校化学学报 ›› 2022, Vol. 43 ›› Issue (2): 20210591.doi: 10.7503/cjcu20210591

• 物理化学 • 上一篇    下一篇

硝酸异丙酯与Cl原子、 OH和NO3自由基反应的机理及动力学

孙翠红1(), 吕立强1, 刘迎1, 王妍1, 杨静1, 张绍文2()   

  1. 1.石家庄学院化工学院, 石家庄 050035
    2.北京理工大学化学与化工学院, 北京 100081
  • 收稿日期:2021-08-18 出版日期:2022-02-10 发布日期:2021-10-08
  • 通讯作者: 孙翠红 E-mail:schyjy@163.com;swzhang@bit.edu.cn
  • 作者简介:张绍文, 男, 博士, 教授, 主要从事计算量子化学等方面的研究. E-mail: swzhang@bit.edu.cn
  • 基金资助:
    国家自然科学基金(21673018);河北省人力资源与社会保障厅项目(A202001079);河北省高等学校科学技术研究项目(Z2018015);石家庄学院河北省杂环类化合物技术创新中心项目(SG2021122)

Mechanism and Kinetics on the Reaction of Isopropyl Nitrate with Cl, OH and NO3 Radicals

SUN Cuihong1(), LYU Liqiang1, LIU Ying1, WANG Yan1, YANG Jing1, ZHANG Shaowen2()   

  1. 1.College of Chemical Engineering,Shijiazhuang University,Shijiazhuang 050035,China
    2.School of Chemistry and Chemical Engineering,Beijing Institute of Technology,Beijing 100081,China
  • Received:2021-08-18 Online:2022-02-10 Published:2021-10-08
  • Contact: SUN Cuihong E-mail:schyjy@163.com;swzhang@bit.edu.cn
  • Supported by:
    the National Natural Science Foundation of China(21673018);the Program of the Department of Human Resources and Social Security of Hebei Province, China(A202001079);the Scientific Research Foundation for University of Hebei Province, China(Z2018015);the Technology Innovation Center of Hebei Province for Heterocyclic Compound, Shijiazhuang University, China(SG2021122)

摘要:

采用CCSD(T)//M06-2X/6-311++G(d,p)方法, 结合传统过渡态理论, 研究了硝酸异丙酯与Cl原子、 OH及NO3自由基的反应机理和动力学. 两个反应物单体首先形成氢键复合物, 随后X(X=Cl原子、 OH和NO3自由基)提取硝酸异丙酯中叔碳的α-H原子或甲基的β-H原子, 室温下, 以X提取α-H原子为主. 反应的主要历程为 Cl原子(OH或NO3自由基)提取(CH3)2CHONO2α-H原子, 生成HCl(H2O或HNO3)分子和(CH3)2CONO2自由基, 后者分解为丙酮和NO2. 结果表明, 在200~500 K温度范围内, 随着温度的升高, 丙酮和NO2的产率降低; 在室温下, 硝酸异丙酯与Cl原子、 OH和NO3自由基反应的速率常数分别为3.933×10-11, 1.182×10-13和7.134×10-19 cm3·molecule-1·s-1. 计算所得硝酸异丙酯与OH自由基反应的动力学数据与实验结论一致.

关键词: 硝酸异丙酯, 自由基, 反应机理, 动力学

Abstract:

The reaction mechanism of (CH32CHONO2 with X(X=Cl, OH and NO3 radical) was studied at M06-2X/ 6-311++G(dp) level of theory, and the energy of the stationary points was calculated by CCSD(T) method. The kinetics of the reaction was calculated by the conventional transition state theory. The hydrogen bonded complexes are formed firstly by isopropyl nitrate and X radical, and X radical can abstract the α-H or β-H atoms from (CH32CHONO2. The α-H abstraction is the main channel, and the main products are (CH32CO + NO2 + HCl(H2O or HNO3). The yield of α-H abstraction products decreases as the temperature increases from 200 K to 500 K for IPN + OH reaction. The overall rate constant for the reaction of (CH32CHONO2 with Cl atom, OH and NO3 radical at 300 K is 3.933×10-11, 1.182×10-13, and 7.134×10-19 cm3·molecule-1·s-1, respectively. The theoretical kinetics data is in consistent with the previous experimental values for the reaction of OH with isopropyl nitrate.

Key words: Isopropyl nitrate, Radical, Reaction mechanism, Kinetics

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