| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1193862 | International Journal of Mass Spectrometry | 2008 | 7 Pages |
Abstract
The MS/MS spectrum of the metastable molecular ions of dimethyl isophthalate 1 differs from that of the isomeric dimethyl terephthalate 2 by the observation of, inter alia, a quite intense loss of C,H2,O ascribed to formaldehyde. Results obtained using a combination of mass spectrometry techniques suggest that this process could consist of an isomerization reaction of the molecular ion into an ion-neutral complex (INC) linking a benzoyl radical and neutral formaldehyde to a proton [ArCOâ¯Hâ¯OCH2]+. Within the complex, a proton transfer catalyzed by formaldehyde occurs resulting in the production of an ionized cyclohexadienylidene methanone (ketene) structure.
Related Topics
Physical Sciences and Engineering
Chemistry
Analytical Chemistry
Authors
Robert Flammang, Noémie Dechamps, Pascal Gerbaux, Pham-Cam Nam, Minh Tho Nguyen,