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Acta Cryst. (2007). E63, m2597 [ doi:10.1107/S1600536807045904 ]
Abstract: In the title compound, [Co(H2O)6](C6H6O4S)2·2H2O, the CoII ion lies on an inversion center and is octahedrally coordinated by six water molecules. Two independent water molecules in the [Co(H2O)6]2+ cation are disordered over two sites, with half occupancy for each site. The 4-hydroxybenzenesulfonate (L-) anion does not coordinate to the cobalt ion but rather acts as a counter-ion. The asymmetric unit is completed by an uncoordinated water molecule. The crystal structure is composed of alternating layers of [Co(H2O)6]2+ cations and L- anions, with the lattice water molecules located in channels along the a direction. The [Co(H2O)6]2+ cations, L- anions and solvent water molecules are connected through a complex pattern of hydrogen-bonding interactions.
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