N-(2-Allyl-4-chloro-2H-indazol-5-yl)-4-meth­oxy­benzene­sulfonamide hemi­hydrate

The fused five- and six-membered rings in the title compound, C₁₇H₁₆ClN₃O₃S·0.5H₂O, are practically coplanar, with the maximum deviation from the mean plane being 0.057 (3) Å for the C atom bound to the exocyclic N atom. The indazole system makes a dihedral angle of 66.18 (12)° with the plane through the benzene ring, and it is nearly perpendicular to the allyl group, as indicated by the N—N—C—C torsion angle of 79.2 (3)°. In the crystal, the water mol­ecule, lying on a twofold axis, forms O—H...N and accepts N—H...O hydrogen bonds. Additional C—H...O hydrogen bonds contribute to the formation of a chain along the b-axis direction.

2-Allyl-7-nitro-2H-indazole

The asymmetric unit of the title compound, C₁₀H₉N₃O₂, contains two independent mol­ecules linked by a C—H...N hydrogen bond. Each mol­ecule has a similar conformation, being built up from fused five- and six-membered rings, each linked to an ally and nitro group, respectively. The indazole ring system makes dihedral angles of 2.7 (2) and 2.2 (2)°, respectively, with the plane through the nitro group. The allyl group is nearly perpendicular to the indazole system, as indicated by the N—N—C—C torsion angles of −75.3 (2) and −82.2 (2)°, this being the most important difference between the conformations of the two mol­ecules. In the crystal, mol­ecules are linked by C—H...O and π–π [inter-centroid distance = 3.6225 (8) Å] inter­actions to form a three-dimensional network.