Studies in organic mass spectrometry—V: N-arylsulphonyliminopyridinium betaines

✍ Scribed by M. Ikeda; S. Kato; Y. Sumida; Y. Tamura

• Publisher: John Wiley and Sons
• Year: 1971
• Tongue: English
• Weight: 373 KB
• Volume: 5
• Category: Article
• ISSN: 1076-5174
• DOI: 10.1002/oms.1210051205

✦ Synopsis

The mass spectral fragmentation of N-arylsulphonyliminopyridinium betaines has been rationalized using high resolution mass spectrometry as well as deuterium labelling. The most characteristic features are a very facile N-S bond cleavage and skeletal rearrangements accompanied by the expulsion of SO, from the molecular ion and the [M -11 ion to the corresponding ionized N-aryliminopyridinium betaines and azacarbazoles, respectively. The presence of methyl substituents at the a-position of the pyridine ring has a significant effect on the mode of the fragmentation.