2-(Dinitromethylene)-1-nitro-1, 3-diazacyclopentane-Based Energetic Salts

Energetic salts that contain nitrogen-rich cations and the 2-(dinitromethyl)-3-nitro-1, 3-diazacyclopent-1-ene anion were synthesized in high yield by direct neutralization reactions. The resulting salts were fully characterized by multinuclear NMR spectroscopy (1H and 13C), vibrational spectroscopy (IR), elemental analysis, density and differential scanning calorimetry (DSC), and elemental analysis. Additionally, the structures of the ammonium (1) and isopropylideneaminoguanidinium (9) 2-(dinitromethyl)-3-nitro-1, 3-diazacyclopent-l-ene salts were confirmed by single-crystal X-ray diffraction. Solid-state 15N NMR spectroscopy was used as an effective technique to further determine the structure of some of the products. The densities of the energetic salts paired with organic cations fell between 1.50 and 1.79 g.cm3 as measured by a gas pycnometer. Based on the measured densities and calculated heats of formation, detonation pressures and velocities were calculated using Explo 5.05 and found to to be 25.235.5 GPa and 79499004 m.s1, respectively, which make them competitive energetic materials.