B. Liu, Bo Yang
Nov 20, 2008
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Journal
Acta Crystallographica Section E: Structure Reports Online
Abstract
In the title compound, [Ca(C15H9O7S)(H2O)6](C15H9O7S)·3H2O, the Ca centre has a distorted decahedral geometry, coordinated by six O atoms from water molecules and one sulfonate O atom. The crystal structure is stabilized by aromatic π–π interactions, with centroid–centroid distances of 3.765 (5) and 3.896 (5) Å between the phenyl ring and the benzene ring of the chromene unit of neighbouring molecules. In addition, the stacked molecules exhibit inter- and intramolecular O—H⋯O hydrogen bonds, including the uncoordinated water molecules.