RESUMO
In the asymmetric unit of the title salt, C6H9N2 (+)·C7H7O3S(-), there are two independent 2-amino-6-methyl-pyridinium cations and two independent 4-methyl-benzene-sulfonate anions. Both cations are protonated at their pyridine N atoms and their geometries reveal amine-imine tautomerism. In the 4-methyl-benzene-sulfonate anions, the carboxyl-ate groups are twisted out of the benzene ring planes by 88.4â (1) and 86.2â (2)°. In the crystal, the sulfonate O atoms of an anion inter-act with the protonated N atoms and the 2-amino groups of a cation via a pair of N-Hâ¯O hydrogen bonds, forming an R 2 (2)(8) ring motif. These motifs are connected via N-Hâ¯O hydrogen bonds, forming chains running along the a-axis direction. Within the chains there are weak C-Hâ¯O hydrogen bonds present. In addition, aromatic π-π stacking inter-actions [centroid-centroid distances = 3.771â (2), 3.599â (2), 3.599â (2) and 3.497â (2)â Å] involving neighbouring chains are also observed.
RESUMO
In the asymmetric unit of the title mol-ecular salt, C6H9N2 (+)·C2Cl3O2 (-), there are two independent 2-amino-6-methyl-pyridinium cations and two independent tri-chloro-acetate anions. The pyridine N atom of the 2-amino-6-methyl-pyridine mol-ecule is protonated and the geometries of these cations reveal amine-imine tautomerism. Both protonated 2-amino-6-methyl-pyridinium cations are essentially planar [maximum deviations = 0.026â (2) and 0.012â (2)â Å]. In the crystal, the protonated N atom and the 2-amino group of the cation are hydrogen bonded to the carboxyl-ate O atoms of the anion via a pair of N-Hâ¯O hydrogen bonds, forming an R 2 (2)(8) ring motif. These motifs are connected via N-Hâ¯O and C-Hâ¯O hydrogen bonds to form slabs parallel to (101).