Conversion of arylhydrazones of bromonitroformaldehyde and arylazatrinitromethanes to 3-aryl-1,2,3,4-oxatriazolium-5-ones

Mesoionic 3-aryl-1,2,3,4-oxatriazolium-5-ones rather than 1,4-diaryl-dihydro-3,6-dinitro-1,2.,4,5-tetrazines, as previously assumed, are formed when arylhydrazones of bromonitroformaldehyde and arylazotrinitromethanes are heated in acetic acid.Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 12, pp. 1682–1684, December, 1981.