Crystal structure and Hirshfeld surface analysis of (Z)-6-[(2-hydroxy-4-methylanilino)methylidene]-4-methylcyclohexa-2,4-dien-1-one

Abstract

The title compound, C15H15NO2, is a Schiff base that exists in the keto-enamine tautomeric form and adopts a Z configuration. The molecule is almost planar, with the two phenyl rings twisted relative to each other by 9.60 (18)°. There is an intramolecular N - H...O hydrogen bond present forming an S(6) ring motif. In the crystal, pairs of O - H...O hydrogen bonds link adjacent molecules into inversion dimers with an R22 (18) ring motif. The dimers are linked by very weak π-π interactions, forming layers parallel to (01). Hirshfeld surface analysis, two-dimensional fingerprint plots and the molecular electrostatic potential surfaces were used to analyse the intermolecular interactions, indicating that the most important contributions for the crystal packing are from H...H (55.2%), C...H/H...C (22.3%) and O...H/H...O (13.6%) interactions.