Acta Cryst. (2012). E68, o186  [ doi:10.1107/S1600536811053025 ]

2,3-Diaminopyridinium sorbate-sorbic acid (1/1)

M. Hemamalini, J. H. Goh and H.-K. Fun

Abstract: In the title molecular salt-adduct, C₅H₈N₃⁺·C₆H₇O₂^-·C₆H₈O₂, the 2,3-diaminopyridinium cation is essentially planar, with a maximum deviation of 0.013 (2) Å, and is protanated at its pyridine N atom. The sorbate anion and sorbic acid molecules exist in extended conformations. In the crystal, the protonated N atom and one of the two amino-group H atoms are hydrogen bonded to the sorbate anion through a pair of N-HO hydrogen bonds, forming an R₁²(6) ring motif. The carboxyl groups of the sorbic acid molecules and the carboxylate groups of the sorbate anions are connected via O-HO hydrogen bonds. Furthermore, the ion pairs and neutral molecules are connected via intermolecular N-HO hydrogen bonds, forming sheets lying parallel to (100).

Online 21 December 2011

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