高等学校化学学报 ›› 1993, Vol. 14 ›› Issue (6): 836.

• 研究论文 • 上一篇    下一篇

自然键轨道方法研究分子的芳香性

单立安, 黎乐民   

  1. 北京大学化学系, 北京 100871
  • 收稿日期:1992-07-22 修回日期:1993-02-01 出版日期:1993-06-24 发布日期:1993-06-24
  • 通讯作者: 黎乐民
  • 基金资助:

    国家自然科学基金

Studies on Molecular Aromaticity by Means of Natural Bond Orbitals

SHAN Li-An, LI Le-Min   

  1. Department of Chemistry, Peking University, Beijing, 100871
  • Received:1992-07-22 Revised:1993-02-01 Online:1993-06-24 Published:1993-06-24

摘要: 用自然键轨道方法研究了环状共轭分子的芳香性,提出了用自然键轨道的准离域能作为量度分子芳香性的标准,用INDO方法和DV-Xα方法计算了20多个环状有机或无机分子的自然键轨道的准离域能。根据准离域能标准判断的分子芳香性大小顺序与文献的结果基本一致,表明本文提出的芳香性量度标准的有效性和可用性。

关键词: 芳香性, 准离域能, 自然键轨道

Abstract: The method of natural bond orbitals is used to investigate the aromaticity of cyclic conjugated molecules.The pseudo-delocalization energy of the natural bond orbitals is defined and adopted as a criterion for measuring the aromaticity of molecules.The pseudo-delocalization energies of the natural bond orbitals of more than twenty organic or inorganic molecules were evaluated by INDOor DV-Xα method and a natural localization program respectively.It is shown that the aromaticity order of these molecules evaluated on basis of the pseudo-delocalization energies is essentially in accordance with those reported in the references, which shows the reasonableness and usableness of the aromaticity criterion proposed in this paper.

Key words: Aromaticity, Pseudo-delocalization energy, Natural bond orbitals

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