organic compounds
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In the cation of the title compound, C16H14N3+·Cl−·2H2O, the cyclohexa-1,3-diene ring displays a screw-boat conformation and the pyridine ring is slightly twisted with respect to the pyrazole ring with a dihedral angle of 4.56 (12)°. In the crystal, ions and water molecules are linked into a three-dimensional network by classical N—HO, N—HCl, O—HCl and O—HO hydrogen bonds and by π–π stacking interactions, with centroid–centroid distances of 3.7580 (14) and 3.7794 (14) Å.