title: catena-Poly[[aqua-dipyridine-copper(II)]-μ-fumarato].
abstract: The title compound, [Cu(C(4)H(2)O(4))(C(5)H(5)N)(2)(H(2)O)](n), is a one-dimensional coordination polymer based on pyridine and fumarate ligands. Each Cu(II) cation is coordinated by two carboxyl-ate O atoms belonging to two fumarate anions, two N atoms from two pyridine mol-ecules and one water mol-ecule, in a square-based pyramidal geometry. Each fumarate anion bridges two Cu(II) cations through the two carboxyl-ate groups in a bis-monodentate fashion to form a one-dimensional polymeric chain along the c axis. Neighbouring chains are linked together to form a two-dimensional network parallel to the ac plane via hydrogen bonding inter-actions between uncoordinated carboxyl-ate O atoms and coordinated water mol-ecules of adjecent chains.
authors.affiliation: State Key Laboratory of Fine Chemicals and School of Chemical Engineering, Dalian University of Technology, Dalian 116012, People's Republic of China.
authors.forename: Dong
authors.initials: D
authors.lastname: Xie
authors.forename: Junwei
authors.initials: J
authors.lastname: Ye
authors.forename: Yuan
authors.initials: Y
authors.lastname: Lin
authors.forename: Guiling
authors.initials: G
authors.lastname: Ning