1,2-Diazinium hydrogen chloranilate

Abstract

In the crystal structure of the title compound, C4H5N2+·C6HCl2O4−, there are three crystallographically independent 1,2-diazinium cations and hydrogen chloranilate anions. The anions are held together by pairs of O—H...O hydrogen bonds to form two types of dimers, one of which is centrosymmetric. The 1,2-diazinium cations are linked on both sides of each dimer via bifurcated N—H...O hydrogen bonds to give two kinds of 2–2 cation–anion associations. The 2–2 associations are linked by intermolecular C—H...O and C—H...N hydrogen bonds, forming a molecular tape along the [230] direction. The tapes are further connected by C—H...O hydrogen bonds, forming a three-dimensional network.