Synthesis, spectroscopic and crystal structure studies of N -{3-cyano-1-[2,6-di-chloro-4-(tri-fluoro-meth-yl)phen-yl]-4-(ethyl-sulfan-yl)-1 H -pyrazol-5-yl}-2,2,2-tri-fluoro-acetamide.

The structure of the title compound, C 15 H 8 N 4 Cl 2 F 6 OS, a phenyl-pyrazole-based insecticide related to ethiprole, fipronil, and derivatives thereof is presented. The pyrazole ring has four chemically diverse substituents, namely a nitro-gen-bound 2,6-di-chloro-4-tri-fluoro-methyl-phenyl and carbon-bound cyano, ethyl-sulfanyl, and 2,2,2-tri-fluoro-acetamide groups. The pyrazole and phenyl rings are perpendicular, subtending a dihedral angle of 89.80 (5)°. In the crystal, strong N-H⋯O hydrogen bonds link the mol-ecules into chains that extend parallel to the a -axis.