高等学校化学学报 ›› 2006, Vol. 27 ›› Issue (4): 708.

• 研究论文 • 上一篇    下一篇

Se-CO-H2O体系生成H2Se的反应机理研究

李静, 瞿永泉, 韩克利, 陆世维, 何国钟   

  1. 中国科学院大连化学物理研究所, 分子反应动力学国家重点实验室, 大连 116023
  • 收稿日期:2005-04-27 出版日期:2006-04-10 发布日期:2006-04-10
  • 通讯作者: 韩克利(1963年出生), 男, 博士, 研究员, 博士生导师, 主要从事分子反应动力学研究. E-mail: klhan@dicp.ac.cn
  • 基金资助:

    国家自然科学基金(批准号: 20373071)资助

Formation Mechanism of Selane from the Reaction System of Selenium,Carbon Monooxide and Water

LI Jing, QU Yong-Quan, HAN Ke-Li, LU Shi-Wei, HE Guo-Zhong   

  1. Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
  • Received:2005-04-27 Online:2006-04-10 Published:2006-04-10
  • Contact: HAN Ke-Li,E-mail: klhan@dicp.ac.cn

摘要:

采用密度泛函理论中的B3LYP/6-31G**方法研究了在三乙胺存在下, 从Se-CO-H2O体系中制备H2Se的详细机理. 溶剂效应采用(CPCM)模式, 在相同的方法与基组条件下模拟了该反应. 计算结果表明, 在四氢呋喃溶液中, 反应通过三个能垒(分别是45.4, 8.4和119.9 kJ/mol)的过渡态. 中间产物[(HOOCSe-) ·(Base·H+)]的稳定性与产物接近, 可以和HSe的铵盐共存, 而且, 按照理论计算的结果, 这种物质可以作为还原剂.

关键词: 硒化氢; 三乙胺; CPCM; 溶剂效应; 四氢呋喃

Abstract:

A detailed mechanism for the formation of selane(H2Se) from Se-CO-H2O system in the presence of triethylamine was studied by density functional theory calculations at the B3LYP/6-31G** level. The solvent effect is assessed by the CPCM method at the same level. The calculations suggest that the reaction proceeds through three transition states with energies barriers of 45.4, 8.4 and 19.9 kJ/mol in solvent tetrahydrofuran, respectively. The intermediate compound [(HOOCSe-)·(Base·H+)], whose stability is close to that of the product, may coexist with amine salt of hydrogen selenide([HSe-]·[Base·H+]) and works as a reductant according to the results of theoretical calculations.

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