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The effect of configuration of gas phase protonated ethenedicarboxylates on their low energy collision induced dissociation behaviour
Author(s) -
Weisz A.,
Mandelbaum A.,
Shabanowitz J.,
Hunt D. F.
Publication year - 1984
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.1210190508
Subject(s) - chemistry , stereospecificity , dissociation (chemistry) , protonation , ion , mass spectrometry , collision induced dissociation , medicinal chemistry , triple quadrupole mass spectrometer , bond dissociation energy , computational chemistry , analytical chemistry (journal) , photochemistry , organic chemistry , tandem mass spectrometry , chromatography , catalysis , selected reaction monitoring
Low energy collision induced dissociation (CID) spectra were measured by a triple stage quadrupole mass spectrometer for the [MH] + ions of diethyl and dimethyl esters of maleic, fumaric, citraconic and mesaconic acids. A very high degree of stereospecificity was observed for the geometrically isomeric diethyl esters. The cis esters give rise to very abundant [MHEtOH] + and [MHEtOHC 2 H 4 ] + ions, while the trans isomers exhibit very abundant [MHC 2 H 4 ] + and [MH2 C 2 H 4 ] + ions. The highly stereospecific processes indicate that the double bond configuration is retained in the protonated species under the conditions of the experiment.