Mass spectrometry of the simple N- vinylpyridinium salts

✍ Scribed by Peter Ellingsen; Georg Hvistendahl

• Publisher: John Wiley and Sons
• Year: 1980
• Tongue: English
• Weight: 337 KB
• Volume: 15
• Category: Article
• ISSN: 1076-5174
• DOI: 10.1002/oms.1210150108

✦ Synopsis

Abstract

N‐ Vinylpyridinium halides readily undergo a Hofmann type elimination, prior to evaporation in the mass spectrometer, with formation of pyridine, acetylene and hydrogen halide as volatile products. A second important reaction is thermally induced two electron reduction of the cation to the volatile N‐vinyldihydropyridine. Of minor importance is the formation of volatile compounds with the elemental composition of [cation + C~2~H] and [cation + C~2~H~3~]. The latter is suggested to have a divinyldihydropyridine structure. Its formation is explained as due to nucleophilic attack on the cation by the N‐vinyldihydropyridine present with displacement of pyridine.