S. Chantrapromma, Jutatip Jeerapong, Thongchai Kruahong
Apr 21, 2010
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Journal
Acta Crystallographica Section E: Structure Reports Online
Abstract
The title compound, C16H16O4, a dihydrochalcone, was isolated from the rhizomes of Etlingera littoralis. The molecule is twisted with a dihedral angle of 71.69 (6)° between the two aromatic rings. The propanone unit makes dihedral angles of 4.07 (6) and 73.56 (7)°, respectively, with the 2,6-dihydroxy-4-methoxyphenyl and phenyl rings. The methoxy group is approximately coplanar with the attached benzene ring with a dihedral angle of 1.74 (10)°. An intramolecular O—H⋯O hydrogen bond generates an S(6) ring motif. In the crystal, intermolecular O—H⋯O hydrogen bonds link the molecules into chains along [201]. A π–π interaction with a centroid–centroid distance of 3.5185 (6) Å is also observed.