高等学校化学学报 ›› 1999, Vol. 20 ›› Issue (5): 788.

• 论文 • 上一篇    下一篇

CnSi(n=49,50)的理论研究

葛茂发, 封继康, 崔勐, 王素凡, 田维全, 孙家锺   

  1. 吉林大学理论化学研究所, 理论化学计算国家重点实验室, 长春 130023
  • 出版日期:1999-05-24 发布日期:1999-05-24
  • 通讯作者: 封继康
  • 作者简介:葛茂发,男,27岁,博士.
  • 基金资助:

    国家自然科学基金(批准号:29573104,29890210)资助课题

Theoretical Studies of Various Possible Structures of CnSi( n =49,50)

GE Mao-Fa, FENG Ji-Kang, CUI Meng, WANG Su-Fan, TIAN Wei-Quan, SUN Chia-Chung   

  1. Institute of Theoretical Chemistry, Statel Key Laboratory of Theoretical and Computational Chemistry, Jilin University, Changchun, 130023
  • Online:1999-05-24 Published:1999-05-24

摘要: 用量子化学从头算方法研究了CnSi(n=49,50)的各种可能的构型.结果表明,C49Si为硅取代碳笼C50中一个碳原子而形成的骨架硅杂碳笼,C49Si与C50相比稳定性较低,化学活性较高.C50Si有两种类型结构:Ⅰ为外接型,Ⅱ为四连接型.计算结果表明,对C50Si,外接硅型化合物更稳定,即Ⅰ为主要成分.计算结果与实验结果是一致的.

关键词: C49Si, C50Si, 结构

Abstract: The possible structures of CnSi( n =49, 50) are studied by using quantum chemistry ab initio method. Our studies show that C49Si has a closed cage structure with the silicon atom networked into the fullerene cage, and C49Si has a lower stability and higher chemical activity than the C50fullerene. There are two kinds of structures for C50Si, namely, Ⅰ exohedral and Ⅱ hole defect(the silicon atom connects to four carbon atoms). The calculated results show that, for C50Si, the exohedral complexes are more stable, i. e ., complexes Ⅰ are the main ingredient. The calculated results are in agreement with those of experimental observations.

Key words: C49Si, C50Si, Structure

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