The Chemistry and Properties of Energetic Materials Bearing [1,2,4]Triazolo[4,3‐b][1,2,4,5]tetrazine Fused Rings

Abstract Treatment of heterocyclic amines featuring fused rings of [1,2,4]triazolo[4,3‐ b ][1,2,4,5]tetrazine with fuming HNO 3 /P 2 O 5 leads to six fully characterized explosives through multiple nitration and reduction or oxidation mechanism. Thus, 4‐nitro‐ N‐ (3‐nitro[1,2,4]triazolo[4,3‐ b ][1,2,4,5]tetrazin‐6‐yl)‐1,2,5‐oxadiazol‐3‐amine ( 3 b , TTDNF ) showed high performance ( D =9180 m s −1 , P =36.7 GPa) and low impact sensitivity ( IS >40 J) while N ‐([1,2,4]triazolo[4,3‐ b ][1,2,4,5]tetrazin‐6‐yl)‐3‐nitro‐1,2,4‐oxadiazol‐5‐amine ( 4 a , TTNOA ) exhibited a potential cast explosive component with low melting point at 88.2 °C and high onset decomposition temperature at 226.2 °C.