化学学报 ›› 2002, Vol. 60 ›› Issue (3): 438-445. 上一篇    下一篇

研究论文

尿素氯化四乙基铵氢键包合物结构的理论研究

李奇;胡祥丽;马思渝;刘若庄   

  1. 北京师范大学化学系.北京(100875)
  • 发布日期:2002-03-15

Theoretical Studies on the Structure of Hydrogen-Bonding Clathrate of [(C_2H_5)_4N~+Cl~-·2(NH_2)_2CO]

Li Qi;Hu Xiangli;Ma Siyu;Liu Ruozhuang   

  1. Department of Chemistry, Beijing Normal University.Beijing(100875)
  • Published:2002-03-15

选择一种典型的氢键包合物--尿素氯化四乙基铵[(C_2H_5)_4N~+CL~-·2 (NH_2)_2CO],利用半经验的AM1 MO方法,计算了它的结构,并对基自组装过程的 分子间弱相互作用进行了分析。结果表明,自组装的本质,除主体分子间的氢键 和主客体分子间的电荷作用外,主客体分子间还存在其它弱的相互作用,使体系具 有明显的稳定化效应。

关键词: 氢键, 包合物, 尿素, 季铵, 电荷分布

The semi-empirical AM1 MO method is used to calculate the structure of a typical hydrogen-bonding clathrate -- urea tetraethylammonium chloride complexes [(C_2H_5)_4N~+CL~-·2(NH_2)_2CO], and the weak intermolecular interaction in the self-assembled process is analyzed. The results show that the essence of self-assembled process is that besides the hydrogen-bond effects among the host molecules and the charge effects among the host-guest molecules, other weak interactions among the host-guest molecules exist, which have obvious stabilization effect to the whole system.

Key words: HYDROGEN BONDS, CLATHRATES, UREA, QUATERNARY AMMONIUM COMPOUNDS, CHARGE DISTRIBUTION

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