A Novel Energetic Ionic Salt: Hydroxylammonium Potassium 3,3-Dinitro-5,5-bis-1,2,4-triazole-1,1-diolate Dihydrate

A novel energetic ionic salt, hydroxylammonium potassium 3,3'-dinitro-5,5'-bis-1,2,4- triazole-1,1'-diolate dihydrate [(NH3OH)(2)K(DNOBT)(1.5)center dot 2H(2)O], was synthesized and structurally characterized by elemental analysis, IR spectra, C-13 NMR and single-crystal X-ray diffraction. (NH3OH)(2)K(DNOBT)(1.)(5)center dot 2H(2)O crystallizes in triclinic system, space group P (1) over bar with a = 7.9212(6), b = 9.1924(7), c = 14.2549(15) angstrom, alpha= 103.917(2)degrees, beta = 99.736(2)degrees, gamma= 104.8110(10)degrees, V = 944.16(14) angstrom(3), Z = 2, D-c = 1.855 g/cm(3), F(000) = 538, mu= 0.386 mm(-1), S = 1.070, the final R= 0.0525 and wR (I > 2 sigma(I)) = 0.1593. Thermal decomposition of (NH3OH)(2)K(DNOBT)(1.)(5)center dot 2H(2)O and its intermediate potassium 1'-hydroxy-3,3 '-dinitro-5,5 '-bis-1,2,4-triazole-1-olate monohydrate [K(HDNOBT)center dot H2O] was studied by using DSC and TG-DTG. It was found that (NH3OH)(2)K(DNOBT)(1.5)center dot 2H(2)O, which has primarily one exothermic decomposition process at 248.2 V, has better thermal stability than K(HDNOBT)center dot H2O which is decomposed at 210.9 degrees C.