Synthesis, crystal structure and properties of the ammonia salt of 5,5'-bistetrazole-1,1'-diolate

The intermediate diazidoglyoxime (DAG) was synthesized by one-pot method with glyoxime and NaN₃ as starting materials. Then 5,5'-bistetrazole-1,1'-diolate(BTO) was synthesized by reaction of DAG with HCl and Et₂O. The ammonia salt of 5,5'-bistetrazole-1,1'-diolate(ABTOX) was synthesized by metathesis reaction of BTO and NH₄Cl. Its structure was characterized by X-ray single crystal diffractometer. The thermolysis properties of ABTOX were studied by differential thermal analysis/thermogravimetric analysis (DTA/TG), and its impact sensitivity and friction sensitivity were also tested. Results show that the crystal is orthorhombic belonging to space group of Aba2(41) with crystal parameters of the unit cell dimensions as follows: a=1.07165(13) nm, b=1.07033(13) nm, c=1.32904(16) nm, V=1.5244(3) nm³, z=4, D=1.779 g/cm³. The thermal decomposition temperature of ABTOX is 287.8℃ and its impact and friction sensitivities are 46cm and 0, respectively.