(1E,4Z,6E)-5-Hydroxy-1,7-bis(2-methoxyphenyl)-1,4,6-heptatrien-3-one

Abstract

In the title compound, C21H20O4, the central heptatrienone unit is approximately planar, with a maximum atomic deviation of 0.1121 (11) Å; the two benzene rings are twisted with respect to the heptatrienone mean plane by 2.73 (5) and 29.31 (4)°. The molecule exists in the enol form and the hydroxy group forms an intramolecular hydrogen bond with the neighboring carbonyl group. Weak intermolecular C—H...O hydrogen bonding is present in the crystal structure.