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