4-Hydroxy-2-methyl-3,4-diphenylcyclopent-2-en-1-one

Abstract

The asymmetric unit of title compound, C18H16O 2, contains two molecules with slightly different conformations. In the first mol-ecule, the two phenyl rings make dihedral angles of 84.98 (11)° and the five-membered ring makes dihedral angles of 84.80 (12) and 73.00 (12)° with the phenyl rings; the corresponding angles for the second mol-ecule are 86.74 (11), 81.20 (13) and 71.36 (12)°. O - H⋯O hydrogen bonds between the hy-droxy and carbonyl groups are a feature of the crystal packing, which results in chains extending parallel to [100]. Weak C - H⋯O and C - H⋯π inter-actions are also observed.