高等学校化学学报 ›› 2002, Vol. 23 ›› Issue (6): 1117.

• 研究论文 • 上一篇    下一篇

C40H2各种可能异构体稳定性的理论研究

杨霞, 王贵昌, 尚贞锋, 杨作银, 潘荫明, 赵学庄   

  1. 南开大学化学系, 天津 300071
  • 收稿日期:2001-03-27 出版日期:2002-06-24 发布日期:2002-06-24
  • 通讯作者: 赵学庄(1933年出生),男,教授,博士生导师,主要从事理论化学研究.E-mail:zhaoxzh@nankai.edu.cn E-mail:zhaoxzh@nankai.edu.cn
  • 基金资助:

    国家自然科学基金(批准号:20073022);中国科学院山西煤炭化学研究所煤转化国家重点实验室开放基金资助

Theoretical Studies on the Stabilities of All Possible C40H2 Isomers

YANG Xia, WANG Gui-Chang, SHANG Zhen-Feng, YANG Zuo-Yin, PAN Yin-Ming, ZHAO Xue-Zhuang   

  1. Department of Chemistry, Nankai University, Tianjin 300071, China
  • Received:2001-03-27 Online:2002-06-24 Published:2002-06-24

摘要: 采用AM1和PM3两种半经验方法,对D5d对称性的C40及C40H2所有可能异构体的几何构型进行了非限制对称性全优化,得到51种稳定异构体,在此基础上研究了氢的加成反应规律及本体C40和最稳定及最不稳定C40H2异构体的红外光谱,讨论了影响C40(D5d)氢加成异构体稳定性及加成位置选择性的三种主要因素:(1)C40本体几何结构;(2)共轭效应;(3)电荷分布影响.

关键词: 半经验方法, C40H2异构体, 稳定性, 红外光谱

Abstract: The electronic structures of all possible C40H2 isomers and C40 based on D5d symmetry have been calculated with no symmetry constraints at the AM1 and PM3 semiempirical molecular orbital levels. Some rules on addition of H2 to C40 are predicted from the calculations of 51 isomers. Three sorts of main influence factors on isomers stabilities and adding positions, namely, (1) geometric structure of C40, (2) conjugative effect and (3) charge population, are discussed.

Key words: Semiempirical methods, C40H2 isomers, Stability, Infrared spectroscopy

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