A new energetic compound (TAGH)(HTNR) (TAG: triaminoguanidine, H2TNR: 2,4,6-trinitroresorcinol) was synthesized by reacting triaminoguanidine with 2,4,6-trinitroresorcinol (Styphnic acid) in aqueous solution under nitrogen atmosphere. Single crystals suitable for X-ray measurement were obtained. The title compound was characterized by elemental analysis, Fourier transform infrared (FTIR) spectra, differential scanning calorimetry (DSC), thermal gravimetry-differential thermal gravimetry (TG-DTG) and single crystal X-ray diffraction analysis. The crystal belongs to a triclinic system with P-1 space group and cell parameters of a＝0.75554(15) nm, b＝0.90816(18) nm, c＝1.0264(2) nm, α＝101.61(3)°, β＝91.96(3)°, γ＝107.74(3)°, V＝0.6536(2) nm3, Dc＝1.775 g/cm3, Z＝2, F(000)＝360, μ＝0.160 mm－1, R1＝0.0479, and ωR2＝0.0998. The results show that the title compound C7N9O7H11 formed by [C(N2H3)3]＋ and (C6N3O8H2)－ belongs to an ionic compound. There are a lot of intramolecular and intermolecular hydrogen bonds existing in the title compound, which make the title compound stable. Under nitrogen atmosphere with a heating rate of 10 K/min, the thermal decomposition of the title compound displayed one endothermic decomposition process and three exothermic processes with released gas as the main products and only 1% leavings.

Key words: triaminoguanidine, 2,4,6-trinitroresorcinol, crystal structure, thermal analysis