N-(1,5-Dimethyl-3-oxo-2-phenyl-2,3-dihydro-1H-pyrazol-4-yl)-2-(4-nitrophenyl)acetamide

Abstract

In the title compound, C19H18N4O4, the nitrophenyl and phenyl rings are twisted by 67.0 (6) and 37.4 (4)°, respectively, with respect to the pyrazole ring plane [maximum deviation = 0.0042 (16) Å]. The dihedral angle between the mean planes of the phenyl rings is 59.3 (3)°. The amide group, with a C—N—C—C torsion angle of 177.54 (13)°, is twisted away from the plane of the pyrazole ring in an antiperiplanar conformation. In the crystal, N—H...O hydrogen bonds involving the carbonyl group on the pyrazole ring and the amide group, together with weak C—H...O interactions formingR22(10) graph-set motifs, link the molecules into chains along [100]. Additional weak C—H...O interactions involving the nitrophenyl rings further link the molecules along [001], also formingR22(10) graph-set motifs, thereby generating (010) layers.