Acta Cryst. (2013). E69, o1118-o1119 [ doi:10.1107/S1600536813016322 ]
Abstract: In the 3-hydroxypicolinate anion of the title salt, C6H9N2+·C6H4NO3-, an intramolecular O-HO hydrogen bond with an S(6) graph-set motif is formed, so that the anion is essentially planar, with a dihedral angle of 9.55 (9)° between the pyridine ring and the carboxylate group. In the crystal, the cations and anions are linked via N-HO hydrogen bonds, forming a centrosymmetric 2 + 2 aggregate with R22(8) and R42(8) ring motifs. The crystal structure also features N-HN and weak C-H interactions.
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