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Application of low energy CID in the determination of structures of [M – halogen] + ions obtained from diethyl halosuccinates under electron impact
Author(s) -
Weisz A.,
Mandelbaum A.,
Blum W.,
Domon B.,
Muller D.,
Richter W. J.,
Shabanowitz J.,
Hunt D. F.
Publication year - 1987
Publication title -
organic mass spectrometry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.475
H-Index - 121
eISSN - 1096-9888
pISSN - 0030-493X
DOI - 10.1002/oms.1210220202
Subject(s) - halogen , chemistry , protonation , ion , dissociation (chemistry) , electron ionization , hydrogen atom , hydrogen , bond dissociation energy , low energy , atom (system on chip) , analytical chemistry (journal) , atomic physics , organic chemistry , physics , alkyl , computer science , embedded system , ionization
Low energy collision induced dissociation (CID) spectra indicate that m / z 173 ions formed by the loss of a halogen atom from diethyl chloro‐ and bromo‐succinate under electron impact are mixtures of O ‐protonated diethyl maleate (>90%) and fumarate (<10 %). Hydrogen migration precedes the C‐halogen bond cleavage in these cases. The low energy CID spectrum of the m / z 173 [MI] + ion obtained from diethyl iodosuccinate shows that only a small fraction of the [MI] + ions are the O ‐protonated species formed by hydrogen migration. The results of this study demonstrate the potential of low energy CID in the determination of structure (including configuration) of gas phase ions.