Acta Cryst. (2010). E66, o2594-o2595  [ doi:10.1107/S1600536810035646 ]

(E)-3-(4-Chlorophenyl)-3-[3-(4-chlorophenyl)-1H-pyrazol-1-yl]prop-2-enal

V. Susindran, S. Athimoolam, S. A. Bahadur, R. Manikannan and S. Muthusubramanian

Abstract: In the title compound, C₁₈H₁₂Cl₂N₂O, the pyrazole ring is almost planar [r.m.s. deviation = 0.002 Å] while the two chlorophenyl rings are twisted out from the plane of the pyrazole ring, making dihedral angles of 5.3 (1) and 65.34 (4)°. In the crystal, centrosymmetric R₂²(24) dimers are formed about crystallographic inversion centres through a pair of C-HCl interactions. These dimers are further linked through a C-HO hydrogen bond, forming a C(8) chain extending along the a axis. C-H interactions are also observed.

Online 18 September 2010

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