波谱学杂志 ›› 1999, Vol. 16 ›› Issue (2): 145-149.

• 研究论文 • 上一篇    下一篇

苯及其取代物中孪位偶合常数2JCCH的最大键级杂化轨道研究

万坚, 湛昌国   

  1. 华中师范大学化学系, 武汉 430079
  • 收稿日期:1997-12-05 修回日期:1999-03-03 出版日期:1999-04-05 发布日期:2018-01-11
  • 作者简介:万坚,男,1968年出生,在读博士生,讲师
  • 基金资助:
    国家自然科学基金及国家教委基金资助项目

MAXIMUM BOND ORDER HYBRID ORBITAL CALCULATIONS OF THE GEMINAL COUPLING CONSTANTS 2JCCH IN AROMATIC SYSTEMS

Wan Jian, Zhan Changguo   

  1. Department of Chemistry, Central China Normal University, Wuhan 430079
  • Received:1997-12-05 Revised:1999-03-03 Online:1999-04-05 Published:2018-01-11

摘要: 在前文工作的基础上,本文结合MNDO分子轨道方法和最大键级杂化轨道方法研究得到了计算苯及其取代物中孪位偶合常数2JCCH的多元级性关系式.对31个苯及其取代物中孪位偶合常数进行计算的结果表明,计算值与实验值能够较好地吻合.这一研究再次验证了2JCCH值主要是由成键原子的轨道杂化作用,键极性,键长和键角等结构因素所决定.

关键词: 核自旋-自旋偶合, 孪位偶合常数, 杂化轨道, 轨道成份, 净电荷

Abstract: The generalized relationship which correlates the geminal coupling constants with the hybrid orbitals, net atomic charges, bond leng ths and bond angles had been em ployed to obtain one concrete relationship for calculation of the geminal coupling constants 2JCaCbH in aromatic systems. The geminal coupling constants evaluated by use of the concrete relationship are in good agreement with the experimental data, which show s that the generalized relationship is feasible for elucidating the geminal coupling constants 2JCaCbH in aromatic systems.

Key words: Geminal coupling constants, Hybrid orbitals, Orbital characters, Net atomic charges