Synthesis, Characterization, and Evaluation of Energetic Properties of Novel 1,3,4‐Oxadiazole Bridged Difluoroaminofurazans

ABSTRACT Two novel difluoroaminofurazan compounds were synthesized through four steps from methyl 4‐aminofurazan‐3‐carboxylate, involving ester exchange, condensation, cyclization, and fluorination. These compounds, incorporating the key difluoroamino (NF 2 ) explosophore to enhance enthalpy of formation, exhibit promising energetic properties. Thermal analysis (TGA/DSC) revealed that the mono ‐1,3,4‐oxadiazole‐bridged derivative melts at 66.02°C and begins decomposition at 149.23°C. It possesses a density of 1.881 g·cm − 3 , an enthalpy of formation of 411.1 kJ·mol − 1 , a detonation velocity of 7505 m·s − 1 , and a detonation pressure of 24.9 GPa. In comparison, the bis ‐1,3,4‐oxadiazole‐bridged analog demonstrates superior thermal stability, with a melting point of 182.44°C and an onset decomposition temperature of 220.09°C. Its properties include a density of 1.743 g·cm − 3 , an enthalpy of formation of 447.8 kJ·mol − 1 , a detonation velocity of 7573 m·s − 1 , and a detonation pressure of 25.0 GPa.