Acta Cryst. (2013). E69, o1353
[ doi:10.1107/S1600536813020606 ]
Abstract: 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-HN and accepts N-HO hydrogen bonds. Additional C-HO hydrogen bonds contribute to the formation of a chain along the b-axis direction.
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