The synthesis, crystal structure and spectroscopic analysis of ( E )-3-(4-chloro-phen-yl)-1-(2,3-di-hydro-benzo[ b ][1,4]dioxin-6-yl)prop-2-en-1-one.

The synthesis, crystal structure and spectroscopic analysis of ( E )-1-(2,3-di-hydro-benzo[ b ][1,4]dioxin-6-yl)-3-(4-chloro-phen-yl)prop-2-en-1-one (C 17 H 13 ClO 3 ), a substituted chalcone, are described. The overall geometry of the mol-ecule is largely planar (r.m.s. deviation = 0.1742 Å), but slightly kinked, leading to a dihedral angle between the planes of the benzene rings at either side of the mol-ecule of 8.31 (9)°. In the crystal, only weak inter-actions determine the packing motifs. These include C-H⋯O and C-H⋯Cl hydrogen bonds and π-π overlap of aromatic rings.