rates of N-methylation of 2-Methybenzotriazole, 2,1,3-Benzoxadiazole, 2,1,3-Benzothia(or Selena)diazole, 1,2,5-Oxadiazole and 1,2,5-Thiadiazole

Abstract

The rates of quaternization of the title compounds with dimethyl sulphate are reported. The reactivity order is Se > NMe > S > O; benzofusion has only a small rate-diminishing effect.

Energetic [1,2,5]oxadiazolo [2,3-a]pyrimidin-8-ium Perchlorates: Synthesis and Characterization

“…Although a few 2-methyl-1,2,5-oxadiazolium [ 43 ] and 1,2,5-oxadiazolo [2,3- a ]-pyrimidinium perchlorates [ 44 , 45 ] were synthesized, only partial physical and spectral properties were available, but the sensitivity, thermal stability, combustion features, and explosive performance were not reported. However, these early studies have demonstrated that monocyclic salts are less accessible and more reactive.…”