C 8 N 26 H 4 : An Environmentally Friendly Primary Explosive with High Heat of Formation

The synthesis and characterization of the metal‐free polyazido compounds 3,6‐bis‐(2‐(4,6‐diazido‐1,3,5‐triazin‐2‐yl)‐hydrazinyl)‐1,2,4,5‐tetrazine ( 2 ) and 3,6‐bis‐(2‐(4,6‐diazido‐1,3,5‐triazin‐2‐yl)‐diazenyl)‐1,2,4,5‐tetrazine ( 4 ) are presented. Two compounds were characterized by NMR spectra, IR spectroscopy, mass spectrometry, and differential scanning calorimetry (DSC). Additionally, the structure of 2 was confirmed by single‐crystal X‐ray diffraction. Compounds 2 and 4 exhibit measured densities (1.755 g cm −3 and 1.763 g cm −3 ), good thermal stabilities (194 °C and 189 °C), high heat of formation (2114 kJ mol −1 and 2820 kJ mol −1 ), and excellent detonation performance (D, 8365 m s −1 and 8602 m s −1 ; P, 26.8 GPa and 29.4 GPa). Furthermore, compounds 2 and 4 have been tested for their priming ability to detonate RDX. The results indicate that the title compound 2 is a potential environmentally friendly alternative candidate to lead‐based primary explosives.