化学学报 ›› 1993, Vol. 51 ›› Issue (4): 313-318.    下一篇

研究论文

叠氮根电负性的量子化学研究

李永富;肖鹤鸣   

  1. 华东工学院化学系
  • 发布日期:1993-04-15

A quantum-chemical study on electronegativity of N3

LI YOAGFU;XIAO HEMING   

  • Published:1993-04-15

用ab initio, MINDO/3, MNDO和DV-Xa等量子化学方法计算研究了一些分子型和离子型(碱金属)叠氮化物及相应氯化物的平衡构型和电子结构。结构表明: 在分子型叠氮化物中叠氮根的电负性较氯小、与氮相当; 而在离子型金属叠氮化物中,叠氮根的电负性和氯相当或较氯稍大。将计算所得正则离域分子轨道进行定域化处理, 发现产生这种电负性差异的主要原因是上述两类叠氮化物中N2的成键状况不同, 本文对此进行了较为细致的分析。

关键词: 叠氮化物, 氯化物, 电子结构, 从头计算法, 电负性, 分子轨道计算

Ab initio MINDO/3, MNDO an DV-Xa quantum chem. calcns. were used to study several mol. and ionic azides and their corresponding chlorides. The electronegativities of mol. azides were smaller than those of the chlorides, but larger than those of the ionic azides. The localized and delocalized MO were calculated The differences in electronegativities in the ionic and nonionic azides were attributed to the difference and bonding types.

Key words: AZIDE, CHLORIDE, ELECTRONIC STRUCTURE, AB INITIO CALCULATION, ELECTRONEGATIVITY, MOLECULAR ORBITALS CALCULATIONS

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