(Z)-3-(Anthracen-9-yl)-1-(2-ethoxyphenyl)prop-2-en-1-one

The molecule of the title chalcone, C25H20O2, consisting of 2-ethoxyphenyl and anthracene rings bridged by a prop-2-en-1-one unit, is twisted and exists in the Z configuration with respect to the central C=C bond. The dihedral angle between the benzene and anthracene rings is 78.17 (9)degrees. The propene unit makes dihedral angles of 44.5 (2) and 81.1 (2)degrees with the benzene and anthracene rings, respectively. The ethoxy substituent is almost coplanar with the attached benzene ring [C-O-C-C torsion angle = 178.57 (19)degrees]. In the crystal, molecules are linked into chains along the a axis by weak C-H center dot center dot center dot O interactions. The crystal structure is further stabilized by C-H center dot center dot center dot pi interactions.