高等学校化学学报 ›› 1996, Vol. 17 ›› Issue (8): 1277.

• 论文 • 上一篇    下一篇

AM1法研究乙烯与环己-1,3-二烯热加成反应

洪三国, 李永红, 王甡   

  1. 江西师范大学化学系, 南昌 330027
  • 收稿日期:1995-09-25 出版日期:1996-08-24 发布日期:1996-08-24
  • 通讯作者: 洪三国,男,35岁,硕士,教授.
  • 作者简介:洪三国,男,35岁,硕士,教授.
  • 基金资助:

    江西省自然科学基金

A Study of Thermal Diels-Alder Reaction of Ethene with Cyclohexa-1,3-diene by Using AM1 Method

HONG San-Guo, LI Yong-Hong, WANG Shen   

  1. Department of Chemistry, jiangxi Normal University, Nanchang 330027
  • Received:1995-09-25 Online:1996-08-24 Published:1996-08-24

摘要: 用AM1方法(采用非限制的Hartree-FockUHF计算)研究乙烯与环己-1,3-二烯的热Diels-Alder反应。结果表明反应是放热的且存在两条竞争的路径;协同反应的活化能以及双自由反应速度控制步骤的活化能分别为112.667kJ/mol和78.406kJ/mol.

关键词: 热加成, 协同过程, 双自由基机理, 过渡态, AM1方法

Abstract: UHF/AM1 molecular orbital method has been employed to study the thermal Diels-Alder reaction of ethene with cyclohexa-1,3-diene,The results showed that this reaction is exothermal,and it has two competitive routes;the activation energy of the concerted process is ll2.667 kJ/mol,and that of the rate-determining step of the biradical pathway is 78.406 kJ/mol,the biradical process has lower activation energy than the concerted one.

Key words: Thermal addition, Concerted process, Biradical mechanism, Transition state, AM1 method

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