title: Hydrogen bonding and pi-pi stacking in dimethylgenistein.
abstract: The title compound, 5-hydroxy-4',7-dimethoxyisoflavone, C17H14O5, is composed of a benzopyranone moiety, a phenyl moiety and two methoxy groups. The benzopyranone ring is not coplanar with the phenyl ring, the dihedral angle between them being 56.28 (3) degrees. The two methoxy groups are nearly coplanar with their corresponding rings, having C-C-O-C torsion angles of 2.9 (2) and 5.9 (2) degrees . The molecules are linked by C-H...O hydrogen bonds into sheets containing classical centrosymmetric R2(2) (8) rings. The sheets are further linked by aromatic pi-pi stacking interactions and C-H...O hydrogen bonds into a supramolecular structure.
authors.affiliation: Organoanalysis Research Laboratory, School of Chemistry and Materials Science, Shaanxi Normal University, Xi'an 710062, People's Republic of China. zhangzunting@sina.com
authors.forename: Zun-Ting
authors.initials: ZT
authors.lastname: Zhang
authors.forename: Xiao-Bing
authors.initials: XB
authors.lastname: Wang
authors.forename: Qian-Guang
authors.initials: QG
authors.lastname: Liu
authors.forename: Jian-Bin
authors.initials: JB
authors.lastname: Zheng
authors.forename: Kai-Bai
authors.initials: KB
authors.lastname: Yu