高等学校化学学报 ›› 1994, Vol. 15 ›› Issue (3): 418.

• 论文 • 上一篇    下一篇

BnXn0,2-(X=H,Cl;n=4,6,8,9,10,12)稳定性的从头计算研究

于微舟, 张明瑜, 李晓天   

  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
  • 收稿日期:1993-05-17 修回日期:1993-11-25 出版日期:1994-03-24 发布日期:1994-03-24
  • 通讯作者: 张明瑜
  • 作者简介:于微舟,男,52岁,副教授.
  • 基金资助:

    国家自然科学基金

Ab initio Studies on Stabilities for BnXn0,2-(X=H,Cl;n=4,6,8,9,10,12)

YU Wei-Zhou, ZHANG Ming-Yu, LI Xiao-Tian   

  1. Inst. of Theor. Chem., State Key Lab.of Computational Theor. Chem., Jilin Univ., Changchun, 130023
  • Received:1993-05-17 Revised:1993-11-25 Online:1994-03-24 Published:1994-03-24

摘要: 用双ζ型收缩高斯基对全卤代硼烷BnXn0,2-及相应硼烷BnHn0,2-(n=4,6,8,9,10,12)进行了从头计算。讨论中性卤代硼烷稳定存在的原因及BnCln与BnCln0,2-稳定性随n变化的不同趋势,并通过对B4H40,2-结构规则的计算与分析,提出骨架成键轨道未填满电子是B4H40,2-不稳定及迄今尚未发现中性BnHn存在的重要原因。

关键词: 全卤代硼烷, 骨架成键轨道, 双电子排斥能, 稳定性

Abstract: In this paper, ab initio calculations are carried put by using the contracted Gaussian basis sets of double zeta type on the perhalogenated boranes BnCln0,2-(n= 4,6,8,9,10,12) and the corresponding boron hydrides BnHn0,2-.The stabilities of BnCln and BnCln2-were discussed.It was demonstrated that there are great differences of the relative stabilities between these two series.In addition, on the basis of the calculations and analysis of B4H42- structrue rule, it is concluded that B4H42- is unstable owing to the incomplete filling of its framework bonding molecular orbital.For the same reason,BnHn is not stable and has not been synthesized so far.

Key words: Perhalogenated borane, Framework bonding orbital, Repulsive energy of double electrons, Stability

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