2′,3,4,4′,5-Penta-meth-oxy-chalcone

Abstract

In the title chalcone [systemetic name 1-(2,4-dimeth-oxy-phen-yl)-3-(3,4,5- trimeth-oxy-phen-yl)prop-2-en-1-one], C20H22O6, the dihedral angle between the plane of the two benzene rings is 7.03 (4)° with all but one of the meth-oxy groups essentially co-planar with these rings [C - C - O - C torsion angles = -76.1 (2), -0.7 (3), 1.8 (3), -6.2 (3), 2.0 (3)°]. An intra-molecular C - H⋯O inter-action occurs. The crystal packing is stabilized by weak inter-molecular C - H⋯O hydrogen bonds.