Crystal structure of 1-acetyl-3-(4-methylphenyl)-5-phenyl-4,5-dihydro-1H-pyrazole

Abstract

In the title compound, C18H18N2O, the whole molecule is not planar but the phenyl ring systems are planar individually. The central pyrazole ring system is twisted with puckering parameters Q = 0.1610(18) and phi = 82.2(6)A degrees. The crystallographic structure is stabilized by C-Ha <-N type intramolecular hydrogen bond, generating ring motif R(5).