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Mass spectrometric study of some pyrazoline derivatives

✍ Scribed by Esmat F. Saad; Nagwa M. Hamada; Saber M. Sharaf; Samir K. El Sadany; Adel M. Moussa; Mohamed Elba

Publisher: John Wiley and Sons
Year: 1998
Tongue: English
Weight: 121 KB
Volume: 12
Category: Article
ISSN: 0951-4198
DOI: 10.1002/(sici)1097-0231(19980715)12:13<833::aid-rcm235>3.0.co;2-k

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✦ Synopsis

The structures of some new carboxamide, thiocarboxamide, nicotinoyl and isonicotinoyl pyrazoline derivatives have been related to their mass spectral data. The ions produced under electron impact showed both the characteristic pyrazoline ion and unusual azete fragmentation patterns. These results suggest that the mass spectra of these pyrazoline derivatives are both position and substituent dependent. Fragmentations of the ions are discussed in view of their metastable transitions.

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