Mass spectra of 1,2,4-triazoles—II: Alkyl 1,2,4-triazoles

✍ Scribed by A. J. Blackman; J. H. Bowie

• Publisher: John Wiley and Sons
• Year: 1973
• Tongue: English
• Weight: 424 KB
• Volume: 7
• Category: Article
• ISSN: 1076-5174
• DOI: 10.1002/oms.1210070110

✦ Synopsis

Abstract

The mass spectra of monomethyl 1,2,4‐triazoles contain fragment ions produced by specific cleavage of the heterocyclic ring. A major fragmentation from many molecular ions involves the elimination of HCN, but loss of N~2~ is either very small or completely absent. No N or H scrambling occurs within the triazole ring system, as evidenced by labelling studies. The loss of a hydrogen atom from the molecular ions of 3‐alkyl‐1,2,4‐triazoles (alkyl ⩾ C~2~H~5~) originates from hydrogens attached to the β carbon and nitrogen atoms.