Premium
Effects of molecular geometry on the fragmentation of ionized maleic and fumaric acids; an overdue reappraisal
Author(s) -
Chen Hongwen,
Holmes John L.
Publication year - 1995
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/jms.1190300804
Subject(s) - chemistry , maleic acid , fumaric acid , ionization , dissociation (chemistry) , fragmentation (computing) , metastability , ion , stereochemistry , computational chemistry , organic chemistry , polymer , copolymer , computer science , operating system
The ionized geometric isomers maleic and fumaric acids (( Z )‐ and ( E )‐ethenedicarboxylic acids) were studied by a variety of tandem mass spectrometric techniques. In agreement with much earlier work, the metastable ionized isomers do not reversibly interconvert. They do, however, have two dissociation channels, H 2 O and CO losses, for which common transition states are involved. Ionized maleic acid has one geometry‐specific dissociation, loss of CO 2 . Structures were assigned to all major fragment ions together with their heats of formation.