Crystallographic study of the energetic salt 1,2,4-triazolium perchlorate

Synthesis and crystal structure of 1H-1,2,4-triazole-3,5-di-amine monohydrate

The title compound, a hydrate of 3,5-di-amino-1,2,4-triazole (DATA), C2H5N5·H2O, was synthesized in the presence of sodium perchlorate. The evaporation of H2O from its aqueous solution resulted in anhydrous DATA, suggesting that sodium perchlorate was required to precipitate the DATA hydrate. The DATA hydrate crystallizes in the P21/c space group in the form of needle-shaped crystals with one DATA and one water mol-ecule in the asymmetric unit. The water mol-ecules form a three-dimensional network in the crystal structure. Hirshfeld surface analysis revealed that 8.5% of the inter-molecular inter-actions originate from H⋯O contacts derived from the incorporation of the water mol-ecules.

1-Ethyl-4-isopropyl-1,2,4-triazolium bromide

An ionic compound consisting of a triazolium cation and bromide anion, C7H14N3 +·Br-, has been synthesized and structurally characterized using single-crystal X-ray diffraction and NMR. The compound crystallizes in the monoclinic space group P21/m with the non-hydrogen atoms of one cation lying on general positions and the others lying on a mirror plane. One bromide ion also lies on the mirror. The extended structure exhibits only weak inter-molecular inter-actions between heterocyclic C-H groups and Br- ions.