2-Amino-6-methyl­pyridinium 2,2,2-tri­chloro­acetate

In the asymmetric unit of the title mol­ecular salt, C₆H₉N₂⁺·C₂Cl₃O₂⁻, there are two independent 2-amino-6-methyl­pyridinium cations and two independent tri­chloro­acetate anions. The pyridine N atom of the 2-amino-6-methyl­pyridine mol­ecule is protonated and the geometries of these cations reveal amine–imine tautomerism. Both protonated 2-amino-6-methyl­pyridinium cations are essentially planar [maximum deviations = 0.026 (2) and 0.012 (2) Å]. In the crystal, 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—H...O hydrogen bonds, forming an R₂²(8) ring motif. These motifs are connected via N—H...O and C—H...O hydrogen bonds to form slabs parallel to (101).

2-Amino-6-methyl­pyridinium 4-methyl­benzene­sulfonate

In the asymmetric unit of the title salt, C₆H₉N₂⁺·C₇H₇O₃S⁻, there are two independent 2-amino-6-methyl­pyridinium cations and two independent 4-methyl­benzene­sulfonate anions. Both cations are protonated at their pyridine N atoms and their geometries reveal amine–imine tautomerism. In the 4-methyl­benzene­sulfonate anions, the carboxyl­ate groups are twisted out of the benzene ring planes by 88.4 (1) and 86.2 (2)°. In the crystal, the sulfonate O atoms of an anion inter­act with the protonated N atoms and the 2-amino groups of a cation via a pair of N—H...O hydrogen bonds, forming an R₂²(8) ring motif. These motifs are connected via N—H...O hydrogen bonds, forming chains running along the a-axis direction. Within the chains there are weak C—H...O hydrogen bonds present. In addition, aromatic π–π stacking inter­actions [centroid–centroid distances = 3.771 (2), 3.599 (2), 3.599 (2) and 3.497 (2) Å] involving neighbouring chains are also observed.