高等学校化学学报 ›› 1999, Vol. 20 ›› Issue (1): 101.

• 论文 • 上一篇    下一篇

四氢咪唑取代亚甲基 β-二酮类化合物单分子碎裂的质谱及理论研究

魏君华1, 佘益民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. 北京理工大学化工与材料学院, 北京 100081
  • 收稿日期:1998-03-13 出版日期:1999-01-24 发布日期:1999-01-24
  • 基金资助:

    国家自然科学基金

Mass Spectrometry Study Combined with Theoretical Calculation on the Unimolecular Fragmentation of Tetrahydroimidazole-substituted Methyleneβ-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. Institute of Chemical Engineering and M aterials, Beijing Institute of Technology, Beijing, 100081
  • Received:1998-03-13 Online:1999-01-24 Published:1999-01-24

摘要: 采用串联质谱低能碰撞诱导解离和同位素标记技术研究了四氢咪唑取代亚甲基β二酮类化合物,发现该类化合物单分子碎裂经历了氢迁移、傅氏反应和离子/中性复合物中间体反应的多次重排,并用半经验PM3和AM1计算方法给予了进一步确证.

关键词: 四氢咪唑取代亚甲基 &beta, -二酮类化合物, 质谱, 单分子碎裂, 离子/中性复合物, 理论计算

Abstract: Studies of low-energy collision-induced dissociation and isotopic labeling on ionized te-trahydroimidazole-substituted methyleneβ-diketones by tandem mass spectrometry showed that Their unimolecular fragmentations may involve The reactions of intermediate ion/neutral complexes and multistep rearrangements.The corresponding mechanisms were proved by semiemipirical cal-culations of PM3 and AM1 met hods.

Key words: Tetrahydroimidazole-substituted methyleneβ-diketones, Mass spectrometry, Uni-molecular fragmentation, Ion/neutral complex, Theoretical calculation

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