Received 22 January 2013
The title compound, [Ni(SO4)(C10H8N2)(C2H6O2)(H2O)]n, contains two crystallographically unique NiII atoms, each lying on a twofold rotation axis and having a slightly distorted octahedral environment. It is isotypic with the previously reported CuII analog [Zhong et al. (2011). Acta Cryst. C67, m62-m64]. One NiII atom 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 aqua O atoms. The second NiII atom is surrounded by two N atoms from 4,4'-bipy ligands and four O atoms, two from bridging sulfate ions and from two ethane-1,2-diol ligands. The sulfate anion acts as a bridging ligand, linking adjacent NiII atoms, leading to the formation of linear Ni1-Ni2-Ni1-Ni2 chains along the a-axis direction. Adjacent chains are further bridged by 4,4'-bipy ligands, resulting in a two-dimensional layered polymer parallel to (001). In the crystal, the polymeric layers are linked by extensive O-HO hydrogen-bonding interactions involving the O atoms of the water molecules and the ethane-1,2-diol molecules, resulting in a three-dimensional supramolecular network.
For Ni-(4,4'-bipy) complexes with perchlorate, citraconate or phthalate anions and a water molecule as a second ligand, see: Yang et al. (2003); Kopf et al. (2005); Wang et al. (2006). For an isotypic structure, see: Zhong et al. (2011). For background to coordination polymers, see: Dietzel et al. (2005); Robin & Fromm (2006); 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: ZQ2195 ).
This work was supported by the Scientific Research Foundation of Nanjing College of Chemical Technology (grant No. NHKY-2013-10).
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