Hydrogen bonding and π-π stacking in hexaaquairon(II) bis(4,7-dimethoxyisoflavone-3′-sulfonate) octahydrate

In the structure of the title compound, [Fe(H2O)(6)](C17H13O7S) (2) center dot 8H(2)O, 16 hydrogen bonds exist between the centrosymmetric [Fe(H2O)(6)](2+) cation, the isoflavone-3'-sulfonate anions and the coordinated and solvent water molecules. pi-pi stacking interactions between the isoflavone units, hydrogen bonding and electrostatic interactions result in a three-dimensional supramolecular structure.