Acta Chimica Sinica ›› 1998, Vol. 56 ›› Issue (1): 81-86. Previous Articles     Next Articles

Original Articles

3-苯基-1-丁炔-3-醇质谱碎裂中[C8H7]^+的结构及分子内质子迁移反应

佘益民;宋凤瑞;涂亚平;刘淑莹;傅芳信   

  1. 中国科学院长春应用化学研究所;东北师范大学化学系
  • 出版日期:1998-01-15 发布日期:1998-01-15

Structure of [C8H7]^+ and intramolecular proton transfer reactions in 3-phenyl-1-butyn-3-ol by MS/MS technique

SHE YIMIN;SONG FENGRUI;TU YAPING;LIU SHUYIN;FU FANGXIN   

  • Online:1998-01-15 Published:1998-01-15

The electron impact mass spectrum (EIMS) of 3-phenyl-1-butyn-3-ol was reported in this paper. Collision-induced dissociation (CID) was used to study the gas phase ion structure of [C8H7]^+ formed by the fragmentation of ionized 3-phenyl-1-butyn-3-ol, and that it has the same structure as m/z 103 ions generated by cinnamic acid and α-methylstyrene. Deuterium labelling, metastable ion (MI) and CID experimental results indicate the formation of m/z 103 ion resulting from molecular ion of 3-phenyl-1-butyn-3-ol, which is a stepwise procedure via twice proton transfers, rather than concerted process during the successive elimination of methyl radical and neutral carbon monoxide accompanying hydrogen transfer. Moreover, in order to rationalized these fragmentation processes, the bimolecular proton-bound complex between benzyne and acetylene intermediate has been proposed.

Key words: MASS SPECTROGRAPHY, BENZENE P, ALCOHOL, BUTYNE P, FRAGMENTATION, TRANSLATION REACTION

CLC Number: