高等学校化学学报 ›› 1997, Vol. 18 ›› Issue (10): 1692.

• 研究快报 • 上一篇    下一篇

四氢咪唑取代亚甲基β-二酮质谱碎裂机理的理论研究

魏君华1, 余益民1, 徐文国2, 刘淑莹1   

  1. 1. 中国科学院长春应用化学研究所, 长春 130022;
    2. 北京理工大学, 北京 100081
  • 收稿日期:1997-05-10 出版日期:1997-10-24 发布日期:1997-10-24
  • 通讯作者: 刘淑莹.
  • 作者简介:魏君华, 女, 26岁, 博士研究生.
  • 基金资助:

    国家自然科学基金

Theoretical Study on the Unimolecular Fragmentation of Ionized Tetrahydroimidazole-substituted Methylene β-Diketones

WEI Jun-Hua1, SHE Yi-Min1, XU Wen-Guo2, LIU Shu-Ying1   

  1. 1. Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022;
    2. Beijing Institute of Technology, Beijing 100081
  • Received:1997-05-10 Online:1997-10-24 Published:1997-10-24

关键词: 半经验AM1计算, 离子/中性复合物, 四氢咪唑取代亚甲基&beta, -二酮

Abstract: Semiempirical molecular orbital calculations on the unimolecular massspectrometric fragmentation of tetrahydroimidazole-substituted methylene β-diketones are carried outby Austin Model 1 method, and the calculated results give a strong support to ourexperimental results reported previously. The optimum of the investigated molecular configurationindicates that the two hydrogen atoms attached to nitrogen atom have different activities dueto their chemical environment; the relative energies of the ions in fragmentation pathway ofionized tetrahydroimidazole-substituted methylene β-diketones provide indirectly an evidencefor both the existence of ion/neutral complex and the stabilities of these ions.

Key words: Semiempirical AM1 calculation, Ion/neutral complex, Tetrahydroimidazole-subsubstituted methylene β-diketone

中图分类号: 

TrendMD: