title: Poly[[μ-1,4-bis-(imidazol-1-ylmeth-yl)benzene]bis-(μ(4)-cyclo-hexane-1,4-dicarboxyl-ato)dinickel(II)].
abstract: The structure of the polymeric title compound, [Ni(2)(C(8)H(10)O(4))(2)(C(14)H(14)N(4))](n), features a five-coordinate Ni(II) centre defined by four carboxyl-ate O atoms from two different cyclo-hexane-1,4-dicarboxyl-ate (chdc) ligands and an N atom from one end of a 1,4-bis-(imidazol-1-ylmeth-yl)benzene (1,4-bix) mol-ecule. The NO(4) coordination geometry is distorted square-pyramidal with the N atom in the apical position. Each end of the chdc ligand links pairs of Ni(II) atoms into a paddle-wheel assembly, i.e. Ni(2)(O(2)CR')(4). These are connected into rows owing to the bridging nature of the chdc ligands, and the rows are connected into a two-dimensional grid via the 1,4-bix ligands. The 1,4-bix ligand, which is disposed about a centre of inversion, is disorderd. Two positions of equal occupancy were discerned for the -H(2)C(C(6)H(4))CH(2)- residue.
authors.forename: Bing-Bing
authors.initials: BB
authors.lastname: Li
authors.forename: Gai-Xia
authors.initials: GX
authors.lastname: Fang
authors.forename: Xiao-Na
authors.initials: XN
authors.lastname: Ji
authors.forename: Bo
authors.initials: B
authors.lastname: Xiao
authors.forename: Edward R T
authors.initials: ER
authors.lastname: Tiekink