Poly[aqua(mu(2)-4,4 '-bipyridine-kappa N-2:N ')(ethane-1,2-diol-kappa O)(mu(2)-sulfato-kappa O-2:O ')-nickel(II)]

The title compound, [Ni(SO4)(C10H8N2)(C2H6O2)(H2O)](n), contains two crystallographically unique Ni-II atoms, each lying on a twofold rotation axis and having a slightly distorted octahedral environment. It is isotypic with the previously reported Cu-II analog [Zhong et al. (2011). Acta Cryst. C67, m62-m64]. One Ni-II atom is coordinated by two N atoms from two bridging 4,40-bipyridine (4,4'-bipy) ligands, two O atoms from two sulfate ions and two aqua O atoms. The second Ni-II 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 Ni-II atoms, leading to the formation of linear center dot center dot center dot Ni1-Ni2-Ni1-Ni2 center dot center dot center dot 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-H center dot center dot center dot O hydrogen-bonding interactions involving the O atoms of the water molecules and the ethane1,2-diol molecules, resulting in a three-dimensional supramolecular network.