2-Amino-6-methylpyridinium 2-hydroxybenzoate

In the title molecular salt, C6H9N2+·C7H5O3−, the cation is protonated at its pyridine N atom and and makes a dihedral angle of 16.26 (9)° with the plane of the six-membered ring of the anion. The six-membered ring makes a dihedral angle of 6.09 (3)° with the attached carboxylate group. In the anion, an intramolecular O—H...O hydrogen bond generates an S(6) ring motif and a pair of N—H...O hydrogen bonds generates an R22(8) ring motif. In the crystal, the anions and cations are linked via N—H...O hydrogen bonds to form a tetramer

2-Amino-4-methylpyridinium 2-(4-nitrophenyl)acetate

In the title molecular salt, C6H9N2+·C8H6NO4−, the cation is protonated at its pyridine N atom. In the crystal, the anions are connected by a pair of C—H...O contacts into [100] chains, which generate R22(11) loops and these chains are linked via another C—H...O contact which encloses an R24(10) loop. Adjacent anions and cations are connected through N—H... O hydrogen bonds, generating an R22(8) loop. Two pairs of anions and cations are linked by N—H...O hydrogen bonds, forming a tetramer with an R22(8) loop motif. The packing also features weak C—H...π and π–π [centroid-to-centroid distances = 3.8972 (11) and 3.9549 (10) Å] interactions, which result in a three-dimensional network

2-Amino-4-methylpyridinium 4-hydroxybenzoate

In the title molecular salt, C6H9N2+·C7H5O3−, the cation is protonated at the pyridine N atom and the anion is deprotonated. The pyridine ring is inclined at an angle of 24.96 (11)° to the benzene ring. In the crystal, adjacent anions and cations are linked by a pair of N—H...O hydrogen bonds, generating an R22(8) ring motif; these motifs are further connected by another N—H...O and O—H...O hydrogen bonds into a three-dimensional network. The crystal structure also features weak C—H...O interactions

Bis(2-amino-6-methylpyridinium) 3-nitrobenzene-1,2-dicarboxylate

In the title molecular salt, 2C6H9N2+·C8H3NO62−, the cations are protonated at their pyridine N atoms. The cations and anion are linked by N—H...O and C—H...O hydrogen bonds and a π–π interaction [centroid-to-centroid distance = 3.7299 (13) Å]. In the crystal, N—H...O hydrogen bonds link the anions and cations into an infinite two-dimensional network parallel to (10-1). N—H...O hydrogen bonds generate R12(4), R21(6), R24(18) and R22(11) ring motifs. The structure also features weak C—H...O and C—H...π interactions, which lead to the formation of a three-dimensional network

4-Aminobenzoic acid–quinoline (1/1)

In the title 1:1 adduct, C9H7N·C7H7NO2, the carboxyl group is twisted at an angle of 5.42 (8) Å with respect to its attached benzene ring. In the crystal, the carboxylic acid molecule is linked to the quinoline molecule by an O—H...N hydrogen bond. The 4-aminobenzoic acid molecules are linked by N—H...O hydrogen bonds, forming sheets propagating in (001). Weak aromatic π–π stacking [centroid-to-centroid distances = 3.758 (1) and 3.888 (1) Å] interactions also occur

2-Amino-4-methylpyridinium 2-(3-methylphenyl)acetate

In the title molecular salt, C6H9N2+·C9H9O2−, the cation is protonated at the pyridine N atom and the anion is deprotonated at the hydroxy O atom. The dihedral angle between the benzene and pyridine rings is 66.58 (10)°. In the molecular structure, a pair of N—H...O hydrogen bonds links the anion and cation, generating an R22(8) ring motif. These ring motifs are connected to adjacent anions and cations via intermolecular N—H...O hydrogen bonding, generating a bifurcated R22(8) ring motif. C—H...O, C—H...π and π–π [centroid-to-centroid distances = 3.7053 (11) and 3.9547 (13) Å] interactions lead to the formation of a three-dimensional network

2-Amino-3-methylpyridinium hydrogen phthalate

In the title molecular salt, C6H9N2+·C8H5O4−, the cation is protonated at the pyridine N atom and the anion is deprotonated at the hydroxy O atom. The anion features an intramolecular O—H...O hydrogen bond with the H atom located almost in the middle of the two O atoms. The dihedral angle between the pyridine and benzene rings is 19.17 (12)°. The N—H...O hydrogen bonds generate R22(8) and R24(18) ring motifs. The crystal structure is stabilized by N—H...O hydrogen bonds. The structure is also influenced by weak π–π [centroid-to-centroid distance = 3.7347 (14) Å] interaction between the anions