有机化学 ›› 1987, Vol. 7 ›› Issue (5): 342-346. 上一篇    下一篇

研究论文

取代螺环戊烷的电子轰击和化学电离正,负离子质谱

傅桂香;林守渊;徐永珍;盛怀禹   

  1. 中国科学院上海有机化学研究所
  • 发布日期:1987-10-25

Electron impact (EI) and chemical ionization positive and negative ion (PNCI) mass spectra of substituted spiropentanes

FU GUIXIANG;LIN SHOUYUAN;XU YONGZHEN;SHENG HUAIYU   

  • Published:1987-10-25

本文报道了苯取代螺环戊烷衍生物的电子轰击(EI)正离子和化学电离正、负离子(PNCI)质谱。通过亚稳离子测定,研究了该类化合物的裂解机理。在卤代螺环戊烷的EI质谱中,分子离子峰都很弱,甚至不出现M+离子。其特征离子为[M-X][+]、[M-2X]+和[M-X-HX][+]。Cl正离子谱有较强的[M+H][+]、[M-2X]+和[M-X][+]、CI负离子谱的特征离子为[M+X][-],它们在多数情况下为基峰离子,另外还出现HX2[-]或X[-]离子。

关键词: 化学电离源质谱法, 环戊烷 P, 螺环化合物, 电子轰击

The electron impact and chem. ionization pos. and neg. ion mass spectra of substituted spiropentanes I (R = H, Me, MeO; R1 = H, Me; R2 = H, Br, Cl) were studied. The mechanism of the cleavage of I was studied by means of metastable ion measurements.

Key words: CHEMICAL IONIZATION SOURCE MASS SPECTROMETRY, CYCLOPENTANE P, SPIRO COMPOUNDS, ELECTRON BOMBARDMENT

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