3-(4-Chloro-phen-yl)-5-(4-fluoro-phen-yl)-4,5-dihydro-1H-pyrazole-1-carbothio-amide.

In the title compound, C16H13ClFN3S, the pyrazole ring adopts an envelope conformation with the methine C atom being the flap atom. The chloro- and fluoro-benzene rings are twisted out of the plane of the pyrazole ring [dihedral angles = 15.12 (11) and 80.55 (10)°, respectively]. The amine group is orientated towards a ring N atom, forming an intra-molecular N-H⋯N hydrogen bond. This H atom also forms a hydrogen bond to the F atom, which along with N-H⋯S hydrogen bonding leads to a supra-molecular chain along the c axis. Connections between chains of the type Cl⋯π lead to a layer in the bc plane.