organic compounds
Open access
In the title molecule, C12H12ClN3O2, the benzene and pyrazole rings are inclined to each other at a dihedral angle of 83.3 (3)°. In the crystal, molecules are linked into [010] chains via O—HN hydrogen bonds with the unsubstituted pyrazole N atom acting as the acceptor.
organic compounds
Open access
In the title molecule, C16H16BrN5O3S, the 1,3,4-thiadiazole ring is situated under the benzene ring, forming a dihedral angle of 86.6 (2)°, and with an SCg (where Cg is the centroid of the benzene ring) distance of 3.312 (3) Å. The benzene and 1,3,4-thiadiazole rings form dihedral angles of 83.8 (3) and 57.7 (2)°, respectively, with the central pyrazole ring. In the absence of classical hydrogen bonds, the crystal packing is stabilized by a C—Hπ interaction..