4-{[5-(4-Chloro-phen-yl)-1-(4-fluoro-phen-yl)-1H-pyrazol-3-yl]carbon-yl} -N-ethyl-piperazine-1-carboxamide

Abstract

The asymmetric unit of the title compound, C 23H 23ClFN5O 2, contains two crystallographically independent mol-ecules. In one mol-ecule, the pyrazole ring makes dihedral angles of 43.93 (7) and 35.82 (7)°, respectively, with the fluoro- and chloro-substituted benzene rings, while the corresponding angles in the other mol-ecule are 52.26 (8) and 36.85 (7)°. The piperazine rings adopt chair conformations. In the crystal, adjacent mol-ecules are connected via inter-molecular N - H⋯O, C - H⋯F, C - H⋯N and C - H⋯O hydrogen bonds, forming a two-dimensional network parallel to the bc plane. The crystal structure is further stabilized by a weak π-π inter-action with a centroid-centroid distance of 3.6610 (8) Å and by C - H⋯π inter-actions. © Shahani et al. 2011.