Received 27 February 2013
In the title compound, [Co2(SO4)2(C10H8N2)2(C2H6O2)2(H2O)2]n, there are two crystallographically independent CoII ions, each of which lies on a twofold rotation axis and has a slightly distorted octahedral environment. One CoII ion is coordinated by two N atoms from two bridging 4,4'-bipyridine (4,4'-bipy) ligands, two O atoms from two sulfate ions and two O atoms from aqua ligands. The second CoII ion is similar but with ethane-1,2-diol ligands in place of water molecules. The sulfate anions act as bridging ligands to link two adjacent CoII ions together, leading to the formation of linear Co1Co2Co1Co2chains along the a axis. Adjacent chains are further bridged by 4,4'-bipy ligands, which are also located on the twofold rotation axis, resulting in a two-dimensional layered polymer extending parallel to (001). In the crystal, the layers are linked by extensive O-HO hydrogen-bonding interactions involving the O atoms of the water molecules and ethane-1,2-diol molecules, resulting in a three-dimensional supramolecular network.
For isostructural compounds, see: Zhong et al. (2011); Zhong (2013). For metal complexes with the 4,4'-bipyridine ligand, see: Tong & Chen (2000); Croitor et al. (2011); Lu et al. (2006, 1998); Luachan et al. (2007); Prior et al. (2011); Zhong & Qian (2012). For background to coordination polymers, see: Cui et al. (2002); Sarma et al. (2009); Zhang et al. (2010).
Data collection: CrystalClear (Rigaku, 2007); cell refinement: CrystalClear; data reduction: CrystalClear; program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: XP in SHELXTL (Sheldrick, 2008); software used to prepare material for publication: SHELXTL.
Supplementary data and figures for this paper are available from the IUCr electronic archives (Reference: MW2105 ).
This work was supported by the Scientific Research Foundation of Nanjing College of Chemical Technology (grant No. NHKY-2013-10).
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