Date Published: June 01, 2012
Publisher: International Union of Crystallography
Author(s): Li-Ying Xu, Ning Li, Jia-Min Li, Heng-Qiang Zhang, Zhen-Hai Sun.
The title compound, C23H18ClN3O, exists in an enamine–keto form with the amino group involved in an intramolecular N—H⋯O hydrogen bond. The five-membered ring is nearly planar, the largest deviation being 0.0004 (7) Å, and makes dihedral angles of 16.62 (6), 41.89 (5) and 71.27 (4)° with the phenyl rings. In the crystal, weak C—H⋯O hydrogen bonds link the molecules into supramolecular chains along the b axis.
For general background to Schiff bases derived from 1-phenyl-3-methyl-4-benzoyl-1H-pyrazol-5(4H)-one and their pharmaceutical and agrochemical applications, see: Casas et al. (2007 ▶); Zhang et al. (2008 ▶). For related structures, see: Zhang et al. (2007 ▶); Li et al. (2009 ▶); Chi et al. (2010 ▶).