物理化学学报 >> 2008, Vol. 24 >> Issue (11): 2083-2088.doi: 10.3866/PKU.WHXB20081125

研究论文 上一篇    下一篇

气相中Y+活化CS2中的C—S键

高立国; 宋小利; 陈晓霞; 王永成   

  1. 榆林学院化学化工学院, 陕西 榆林 719000; 四川理工学院化学系, 四川 自贡 643000; 西北师范大学化学化工学院, 甘肃省高分子材料重点实验室, 兰州 730070
  • 收稿日期:2008-05-13 修回日期:2008-06-20 发布日期:2008-11-10
  • 通讯作者: 高立国 E-mail:liguogao2008@163.com;liguogao2008@yahoo.com.cn

C—S Activation of CS2 by Y+ in Gas Phase

GAO Li-Guo; SONG Xiao-Li; CHEN Xiao-Xia; WANG Yong-Cheng   

  1. College of Chemistry and Chemical Engineering, Yulin College, Yulin 719000, Shaanxi Province, P. R. China; Department of Chemistry, Sichuan University of Science &Engineering, Zigong 643000, Sichuan Province, P. R. China; Gansu Key Laboratory of Polymer Materials, College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou 730070, P. R. China
  • Received:2008-05-13 Revised:2008-06-20 Published:2008-11-10
  • Contact: GAO Li-Guo E-mail:liguogao2008@163.com;liguogao2008@yahoo.com.cn

摘要: 以Y+与CS2反应作为第二行前过渡金属离子与CS2反应的范例体系. 采用密度泛函UB3LYP方法, 对于Y+采用Stuttgart 赝势基组, 对于CS2采用6-311+G(2d)基组, 计算研究了Y+离子在基态和激发态时与CS2气相反应的机理. 并用UCCSD(T)方法在相同的基组水平上对各驻点作了单点能量校正. 结果表明Y+离子与CS2的反应是插入-消去反应, 在反应过程中会发生系间窜越, 并且找到了两个势能面的能量最低交叉点.

关键词: 势能面, 反应机理, 能量最低势能面交叉点

Abstract: The reaction of Y+ with CS2, which was selected as the representative system of the reactions of second-row transition metal ions with CS2, was investigated using density functional theory (DFT) with the Stuttgart pseudo potentials and corresponding basis sets for Y+ and the standard 6-311+G(2d) basis sets for C and S atoms. Single-point UCCSD(T) energy calculations were carried out for each stationary point. The object of this investigation was the elucidation of the reaction mechanism. The result shows that the reaction mechanismbetween yttriumion and CS2 is an insertion-elimination mechanism. Intersystemcrossing may occur in the reaction of Y+ with CS2 and a minimumenergy crossing point has been found. All theoretical results are in line with early experiments.

Key words: Potential energy surface, Reaction mechanism, Minimumenergy crossing point

MSC2000: 

  • O641