Acta Cryst. (2013). E69, m649-m650 [ doi:10.1107/S1600536813030365 ]
Abstract: In the centrosymmetric title compound, [Co(C4H11N2)2(H2O)4](SO4)2·2H2O, the CoII atom is coordinated in a distorted octahedral geometry by four water O atoms and two piperazinium N atoms. These four water O atoms define an equatorial plane with a maximum deviation of 0.0384 (1) Å while the two piperazinium N atoms complete the octahedron in the axial positions. Neighboring complex molecules and sulfate anions are connected through an extensive network of N-HO and O-HO hydrogen bonds, which link the different chemical species into layers in the ab plane. Additional Owater-HO hydrogen bonds involving the non-coordinating water molecules and C-HO interactions connect these layers into a three-dimensional supramolecular structure.
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