title: catena-Poly[[tetra-aqua-(μ-4,4'-bipyridine-κN:N')zinc(II)] fumarate tetra-hydrate].
abstract: In the title compound, {[Zn(C(10)H(8)N(2))(H(2)O)(4)](C(4)H(2)O(4))·4H(2)O}(n), the Zn(II) atom is coordinated by two N atoms from two μ-4,4'-bipyridine ligands and four water mol-ecules in a distorted octa-hedral geometry. The coordination unit is extended through the Zn-N bond, leading to a one-dimensional cationic chain. A twofold rotation axis passes through the Zn atom and along the axis of the 4,4'-bipyridine ligand. Each uncoordinated water mol-ecule acts as both hydrogen-bond donor and acceptor. A three-dimensional network is constructed through hydrogen bonds involving water mol-ecules and fumarate dianions.
authors.forename: Yong
authors.initials: Y
authors.lastname: Tian
authors.forename: Ya-Pan
authors.initials: YP
authors.lastname: Wu
authors.forename: Dong-Sheng
authors.initials: DS
authors.lastname: Li
authors.forename: Hui
authors.initials: H
authors.lastname: Wang
authors.forename: Ji-Wu
authors.initials: JW
authors.lastname: Wang