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In the title compound, C16H14ClN3O2S, the dihedral angle between the benzene and pyrazole rings is 52.75 (2)°, while that between the pyrazole and 4-chloro­phenyl rings is 54.0 (3)°. The terminal sulfonamide group adopts an approximately tetra­hedral geometry about the S atom with a C—S—N angle of 108.33 (10)°. In the crystal, pairs of N—H...N hydrogen bonds lead to the formation of inversion dimers. These dimers are linked via a second pair of N—H...N hydrogen bonds and C—H...O interactions, forming a two-dimensional network lying parallel to the bc plane. The two-dimensional networks are linked via C—H...Cl interactions, forming a three-dimensional structure.

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In the title compound, C20H18ClN5S, the toluene and triazole rings are oriented almost perpendicular to each other, making a dihedral angle of 89.97 (9)°, whereas the dihedral angle between cholorophenyl and pyrazole rings is 54.57 (11)°. In the crystal, pairs of N—H...N hydrogen bonds link the mol­ecules into inversion dimers. Weaker C—H...S and C—H...Cl inter­actions are also present.
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