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化学学报
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化学学报 ›› 1995, Vol. 53 ›› Issue (3): 263-268. 上一篇    下一篇

研究论文

十二碳单烯-1-乙酸酯双键位置异构体的质谱研究

袁谷;何美玉;贺晓然;堀池道郎;金哲史;平野千里   

  1. 北京大学化学系;高知大学农药化学研究室
  • 发布日期:1995-03-15

Studies on the mass spectra of positional lsomers of dodecenyl acetate

YUAN GU;HE MEIYU;HE XIAORAN;KUCHI DAOLANG;JIN ZHESHI;PINGYE QIANLI   

  • Published:1995-03-15

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494

本文报道了十二碳单烯-1-乙酸酯双键位置异构体质谱的特征,应用质量分析离子动能谱(MIKES)研究离子的断裂机理,结果表明: 支配此类化合物基本断裂方式的主要是游离基中心引发的各种类型H的重排,双键位移和电荷转移, 离子在断裂前已形成结构上能快速相互转化的异构化离子的混合物, 因此这类双键位置异构体的质谱非常相似.

关键词: 质谱法, 异构体, 断裂机理, 电荷转移, 离子动能谱, 十二碳单烯乙酸酯, 双键位移

The mass spectra of D2 to D11-isomers of dodecenyl acetate were studied using electron impact ionization, high-resoln. data and mass-analyzed ion kinetic energy spectrometry. The principal fragmentation processes of the positional isomerism are dominated by the radical-site rearrangement, double-bond migration and charge transfer along the carbon chain with the aid of rearrangements of hydrogen atoms. The ions of dodecenyl acetates isomerize to a mixture of rapidly interconverting structures prior to fragmentation.

Key words: MASS SPECTROGRAPHY, ISOMER, FRACTURE MECHANISM, CHARGE TRANSFER

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