Nitrogen-rich energetic dianionic salts of 3, 4-bis(1H-5-tetrazolyl)furoxan with excellent thermal stability

Nitrogen-rich 3, 4-bis(1H-tetrazol-5-yl)furoxan (H ₂BTF, 2) and its energetic salts with excellent thermal stability were successfully synthesized and fully characterized by ¹H, and ¹³C NMR, and IR spectroscopy, differential scanning calorimetry (DSC), and elemental analyses. Additionally, the structures of barium (3) and 1-methyl-3, 4, 5-triamino-triazolium (10) salts were confirmed by single-crystal X-ray diffraction. The densities of the energetic salts paired with organic cations range between 1.56 and 1.85 g·cm ^-3 as measured by a gas pycnometer. Based on the measured densities and calculated heats of formation, the detonation pressures and velocities are calculated to be in the range 23.4-32.0 GPa and 7939-8915 m·s ^-1, which make them competitive energetic materials.