Application of low energy CID in the determination of structures of [M - halogen]+ ions obtained from diethyl halosuccinates under electron impact
摘要:
AbstractLow 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.