STRUCTURE OF 3-AMINO-5-NITRO-1,2,4-TRIAZOLE

C2H3N5O2, M(r) = 129.1, monoclinic, C2/c, a = 14.199 (4), b = 4.844 (1), c = 14.258 (4) angstrom, beta = 105.98 (1)-degrees, V = 942.7 (4) angstrom3, Z = 8, D(x) = 1.819 Mg m-3, lambda(Mo Kalpha) = 0.71069 angstrom, mu = 0.149 mm-1, F(000) = 528, room temperature, final R = 0.028 for 705 observed reflections [F > 5sigma(F)] out of 834 independent reflections. The ring geometry is very similar to other substituted 1,2,4-triazoles and is planar within 0.002 angstrom. The molecules are joined by N-H...N hydrogen bonds to form flat ribbons. Adjacent ribbons are joined by N-H...O hydrogen bonds.