title: Hydrogen bonding and pi-pi stacking in methylaminium 4',7-dihydroxyisoflavone-3'-sulfonate dihydrate and hexaaquairon(II) bis(4',7-diethoxyisoflavone-3'-sulfonate) tetrahydrate.
abstract: In methylaminium 4',7-dihydroxyisoflavone-3'-sulfonate dihydrate, CH6N+.C15H9O7S-.2H2O, 11 hydrogen bonds exist between the methylaminium cations, the isoflavone-3'-sulfonate anions and the solvent water molecules. In hexaaquairon(II) bis(4',7-diethoxyisoflavone-3'-sulfonate) tetrahydrate, [Fe(H2O)6](C19H17O7S)2.4H2O, 12 hydrogen bonds exist between the centrosymmetric [Fe(H2O)6]2+ cation, the isoflavone-3'-sulfonate anions and the solvent water molecules. Additional pi-pi stacking interactions generate three-dimensional supramolecular structures in both compounds.
authors.affiliation: School of Chemistry and Materials Science, Shaanxi Normal University, Xi'an 710062, People's Republic of China. zhangzt@snnu.edu.cn
authors.forename: Zun Ting
authors.initials: ZT
authors.lastname: Zhang
authors.forename: Xin Li
authors.initials: XL
authors.lastname: Cheng
authors.forename: Yun
authors.initials: Y
authors.lastname: He
mesh_terms: D000838:Anions / Q000737:chemistry; D001557:Benzenesulfonates / Q000737:chemistry*; D018360:Crystallography, X-Ray; D005296:Ferrous Compounds / Q000737:chemistry*; D006860:Hydrogen Bonding; D007529:Isoflavones / Q000737:chemistry*; D008958:Models, Molecular; D015394:Molecular Structure
chemical_list: D000838:Anions; D001557:Benzenesulfonates; D005296:Ferrous Compounds; D007529:Isoflavones; C519929:hexaaquairon(II) bis(4',7-diethoxyisoflavone-3'-sulfonate); C519928:methylaminium 4',7-dihydroxyisoflavone-3'-sulfonate