Several energetic salts of the 5-amino-3-methyl-1,2,3-oxadiazolium cation were synthesized and characterized. Structures are confirmed by IR, ¹H and ¹³C NMR spectroscopy, and X-ray crystallography. The perchlorate salt was thermally stable, with a crystal density of 1.826 g cm⁻³ and its calculated energetic performance exceeded that of TNT. Except for the perchlorate, these salts are mechanically insensitive. This work explored the methyl sydnone imine cation as a suitable energetic compound, which was quickly obtained through facile syntheses. This is the first exploration of sydnone imines as components of energetic materials.

The first compound containing both a tetrazole and an azasydnone ring, a unique energetic material, is reported. Several energetic salts of the tetrazole azasydnone were synthesized and characterized, leading to the creation of new secondary and primary explosives. Molecular structures are confirmed by ¹H and ¹³C NMR, IR spectroscopy, and X‐ray crystallographic analysis. The high heats of formation, fast detonation velocities, and straightforward synthesis of energetic azasydnones should capture the attention of future energetics research. More information can be found in the Communication by D. G. Piercey et al. (DOI: 10.1002/chem.202002664).