organic compounds
Open access
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—Hπ interactions.
organic compounds
Open access
In the title salt, C6H9N2+·C7H5O3−, the anion is essentially planar, with a dihedral angle of 2.72 (17)° between the benzene ring and the carboxylate group. In the crystal, the anions are connected by O—HO hydrogen bonds, forming a 41 helical chain along the c axis. The protonated N atom and the 2-amino group of the cation are hydrogen bonded to the carboxylate O atoms of the anion via a pair of N—HO hydrogen bonds with an R22(8) ring motif. The ion pairs are further connected via another N—HO hydrogen bond, resulting in a three-dimensional network.