Synthesis and properties of insensitive [1,2,4]triazolo[4,3-b]-1,2,4,5-tetrazine explosives

Abstract

By taking advantage of thermostable 1,2,4,5-tetrazine and energetic 1,2,4-triazole rings, two [1,2,4]triazolo[4,3-b]1,2,4,5-tetrazine explosives were synthesized and fully characterized. Based on experimental and computational data, 3-nitro-[1,2,4]triazolo[4,3-b]1,2,4,5-tetrazin-6-amine (TTNA) was found to demonstrate properties such as a suitable density (1.83 g cm⁻³), favourable thermal stability (T_d, 213 °C), good detonation performance (P, 33.9 GPa; V_D, 8953 m s⁻¹) and low impact sensitivity (IS > 40 J, FS > 360 N).