Structure determination and Hirshfeld surface analysis of new cocrystal and salt forms of 5-aminotetrazole with hydroxy- and nitro-substituted carboxylic acids

Two new crystalline solids, namely, 5-aminotetrazole – 3,5-dihydroxybenzoic acid – water (1/4/6), CH3N5 · 4C7H6O4 · 6H2O (I), and 5-aminotetrazolium 3,5-dinitrosalicylate, CH4N5+ · C7H3N2O7 − (II), have been synthesized and characterized by single-crystal X-ray diffraction and Hirshfeld surface analysis. The crystal packing arrangements of I and II are governed by N — H...O and O — H...O hydrogen-bonding interactions. In cocrystal I, adjacent acid molecules are linked through O — H...O hydrogen bonds, forming a dimer with an R22(8) motif. In salt II, the tetrazolium cation and acid anion are linked through N — H...O hydrogen bonds to also form a dimer with an R22(8) motif. Further N — H...O and O — H...O hydrogen bonds help to stabilize the crystal packing, along with aromatic π – π stacking interactions in I and carbonyl... π interactions in II. The Hirshfeld surface analysis and fingerprint plots reveal that O...H/H...O interactions contribute 34.4% of the total interactions in the crystal packing of cocrystal I and 36.7% in salt II.
Source: Acta Crystallographica Section C - Category: Chemistry Authors: Tags: 5-aminotetrazole intermolecular interaction crystal structure comparative analysis Hirshfeld surface analysis two-dimensional fingerprint plot research papers Source Type: research