6533b820fe1ef96bd1279ba0
RESEARCH PRODUCT
Studies in organic mass spectrometry. Part 23. Role of the aroyl group on the competitive fragmentation reactions of the molecular ion of aroylanilides
Mirella FerrugiaVita Di StefanoRosaria SalettiSalvatore FotiDomenico SpinelliLeopoldo Ceraulosubject
substituent effectsChemistryrearrangement processesPolyatomic ionAnalytical chemistryaroylanilidesMass spectrometryPhotochemistryelectron ionisation; positive ions; ion chemistry; aroylanilides; substituent effects; rearrangement processesIonchemistry.chemical_compoundRadical ionFragmentation (mass spectrometry)positive ionsThiopheneElectronic effectMoietyion chemistryelectron ionisationSpectroscopydescription
The 70 eV and mass-analysed ion kinetic energy (MIKE) spectra of some thiophenecarboxanilides and benzoylanilides (1–10) have been compared in order to investigate the role of the aroyl (or heteroaroyl) moiety on the abundance of the competitive fragmentation reactions occurring in their molecular ions (amide–bond cleavage and phenol radical ion formation). It has been shown that the electron ionisation induced decompositions with high (70 eV) and low (MIKE) internal energy excess are qualitatively similar, but remarkable quantitative differences have been observed that can be accounted for in terms of the different effectiveness in the transmission of electronic effects of substituents in the thiophene and benzene rings.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 1999-01-01 |