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