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Acta Cryst. (2009). E65, o1511-o1512 [ doi:10.1107/S160053680902100X ]
Abstract: In the title salt, C5H8N3+·C7H4NO4-, the pyridine N atom of the 2,3-diaminopyridine molecule is protonated. The protonated N atom and one of the two 2-amino groups are hydrogen bonded to the 4-nitrobenzoate anion through a pair of N-H
O hydrogen bonds, forming an R22(8) ring motif. The carboxylate mean plane of the 4-nitrobenzoate anion is twisted by 3.77 (5)° from the attached ring and the nitro group is similarly twisted by 2.28 (10)°. In the crystal, the molecules are linked by N-HO and C-HO interactions into sheets parallel to (100).
Online 6 June 2009
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