Mass spectra of some azoles

✍ Scribed by J. L. Cotter

• Publisher: John Wiley and Sons
• Year: 1972
• Tongue: English
• Weight: 221 KB
• Volume: 6
• Category: Article
• ISSN: 1076-5174
• DOI: 10.1002/oms.1210061003

✦ Synopsis

The principal electron-impact fragmentation patterns of 3,4,5-triphenyl-l,2,4-triazole, 2,5-diphenyl-l,3,4-thiadiazole, their perfluorinated analogues and 2,5-di(pentafluorophenyl)-1,3,4oxadiazole have been established from metastable ion evidence and precise mass measurements. Although ions produced by expulsion of nitrogen from the molecular-ions of these compounds are of low abundance, the simultaneous expulsion of nitrogen and a C,Xs radical (X = H or F) gives rise to abundant ions.

* Although a metastable peak corresponding to the transition [MI+. + 180+ + 117 was not observed in the spectrum of I, the simultaneous elimination of nitrogen and a C,F, radical from the molecular-ion of I1 is substantiated by an appropriate metastable peak.