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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—H...O, N—H...Cl, O—H...Cl and O—H...O hydrogen bonds and by π–π stacking inter­actions, with centroid–centroid distances of 3.7580 (14) and 3.7794 (14) Å.
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