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Mass spectra of picolinic, nicotinic and isonicotinic acids and of their respective N-oxides

✍ Scribed by Silvana M. de Oliveira; Wagner F. de Giovani; José Ricardo Romero; Joseph Miller

Publisher
John Wiley and Sons
Year
1991
Tongue
English
Weight
193 KB
Volume
26
Category
Article
ISSN
1076-5174

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✦ Synopsis

Mass spectra of picolinic, nicotinic and isonicotinic acids and of their respective N-oxides are presented. Picolinic acid and its N-oxide demonstrate the facile loss of carbon dioxide and low-intensity molecular ions. Fragmentation is relatively simple. Nicotinic and isonicotinic acids show very similar fragmentation patterns. For both, the molecular ion is the base peak. The fragmentations of nicotinic acid N-oxide and of isonicotinic acid N-oxide are more complex than those of the previous four compounds, but are similar to each other.

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