Does deprotonated benzoic acid lose carbon monoxide in collision‐induced dissociation?
Yingying Liu,
Xue Wang,
Danyang Zhang
et al.
Abstract:Decarboxylation is known to be the major fragmentation pathway for the deprotonated carboxylic acids in collision‐induced dissociation (CID). However, in the CID mass spectrum of deprotonated benzoic acid (m/z 121) recorded on a Q‐orbitrap mass spectrometer, the dominant peak was found to be m/z 93 instead of the anticipated m/z 77. Based on theoretical calculations, 18O‐isotope labeling and MS3 experiments, we demonstrated that the fragmentation of benzoate anion begins with decarboxylation, but the initial p… Show more
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