A series of purine-based fused tetracyclic energetic materials was synthesized. Incorporation of explosophoric groups afforded compounds with high densities (1.82-1.85 g cm-3), high positive heats of formation (433.6-709.0 kJ mol-1), and good detonation performance (VOD: 8200-8677 m s-1; DP: 27.5-32.2 GPa). Compounds 5, 6, and 9 exhibit moderate to good thermal stability (Td = 187-207 °C) and low mechanical sensitivity, indicating these materials are promising candidates for HEDMs.
Nehe et al. (Tue,) studied this question.