Studies in organic mass spectrometry. Part 17—Formation of phenol radical ions by rearrangement of the molecular ions of some N-arylthiophenecarboxamides and -benzamides
✍ Scribed by Leopoldo Ceraul; Paolo De Maria; Mirella Ferrugia; Salvatore Foti; Rosaria Saletti; Domenico Spinelli
- Publisher
- John Wiley and Sons
- Year
- 1995
- Tongue
- English
- Weight
- 328 KB
- Volume
- 30
- Category
- Article
- ISSN
- 1076-5174
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✦ Synopsis
Abstract
It has been shown by exact mass measurements and collision‐induced dissociation mass‐analysed ion kinetic energy spectra that the structure of the m/z 124 ion observed in the mass spectra of N‐(4‐methoxyphenyl)thiophene‐2‐carboxamide, N‐(4‐methoxyphenyl)thiophene‐3‐carboxamide, N‐(4‐methoxyphenyl)‐5‐nitrothiophene‐3‐carboxamide and N‐(4‐methoxyphenyl)benzamide is identical with that of the molecular ion of 4‐methoxyphenol. This ion becomes abundant in metastable energy window reactions. A probable mechanism for its formation is discussed.