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

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—H...O 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—H...O hydrogen bonds. Furthermore, the ion pairs and neutral molecules are connected via intermolecular N—H...O hydrogen bonds, forming sheets lying parallel to (100).