Synthesis and Properties of 5, 10-Bis(dinitromethyl)-furazan[3, 4-e]bis([1, 2, 4]triazolo)[4, 3-a: 3', 4'-c] pyrazine and Its Energetic Ion Compounds

An energetic compound 5, 10-bis(dinitromethyl)-furazan[3, 4-e]bis([1, 2, 4]triazolo)[4, 3-a: 3', 4'-c] pyrazine (BOBTP, total yield of seven-step synthesis as 10%) was synthesized using diaminofurazan (DAF) as raw material. Its corresponding energetic ion compounds were synthesized via. neutralization reaction collocated with a series of nitrogen-rich cations. Its structure was characterized by single-crystal X-ray diffraction(XRD), Fourier transform infrared spectroscopy(FT-IR), nuclear magnetic resonance (¹H NMR and ¹³C NMR) and elemental analyses. Its thermal decomposition temperature was measured by thermogravimetry(TG) and differential scanning calorimetry(DSC). Its detonation performance were calculated with Explore 5 v6.02 software. Results show that the crystal of dipotassium salt of BOBTP belongs to monoclinic system and C2/c space group with cell parameters of a=1.9913(3) nm, b=0.93491(12) nm, c=1.6807(2) nm, β=90.160(3)°, V=3129.0(7) nm³, Z=8, D_c=2.103 g·cm^-3, M=1.752 mm^-1, F(000) =1976. For energetic ion compounds obtained based on BOBTP, the measured densities at 25℃ are in the range of 1.62-1.75 g·cm^-3 and the onset temperatures of thermal decomposition reaction are in the range of 186-232℃. The calculated detonation velocities and pressures are higher than 7500 m·s^-1 and 20 GPa, respectively. The measured impact and friction sensitivities are relatively low. In which, the impact sensitivity of dihydroxylamine salt of BOBTP is 18 J and the friction sensitivity is 240 N.