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Insights into the C 4 H 8 +· potential energy surface: Fourier transform ion cyclotron resonance studies of ion–molecule reactions of D‐labeled partners
Author(s) -
Thissen R.,
Dutuit O.,
Audier H. E.,
Mourgues P.
Publication year - 1999
Publication title -
journal of mass spectrometry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.475
H-Index - 121
eISSN - 1096-9888
pISSN - 1076-5174
DOI - 10.1002/(sici)1096-9888(199908)34:8<850::aid-jms840>3.0.co;2-t
Subject(s) - chemistry , fourier transform ion cyclotron resonance , ion cyclotron resonance , ion , molecule , fourier transform , mass spectrometry , cyclotron , analytical chemistry (journal) , nuclear magnetic resonance , atomic physics , organic chemistry , chromatography , mathematical analysis , physics , mathematics
Reactions of [ethylene] +· with ethylene and of [acetylene] +· with ethane were studied by Fourier transform ion cyclotron resonance spectrometry using labeled reactants. The results confirm and clarify the different steps of the mechanism proposed previously and elaborated with other methods. The [[acetylene] +· , ethane] system can either dissociate to give the ethyl cation product, or isomerize into [[ethylene] +· , ethylene]. The latter system can either dissociate to yield ionized ethylene or convert into ionized but‐2‐ene, which undergoes a complete H‐exchange prior to dissociation, leading to methyl radical, hydrogen radical and ethylene losses. The transfers of labeled atoms and the existence of H‐exchange prior to formation of the products were used as a probe to check the different steps of the mechanism. The influence of the initial energy of the system on the reaction pathway is discussed. Copyright © 1999 John Wiley & Sons, Ltd.