title: Catena-poly[bis[(2,2-bipyridine-kappa2N,N')copper(II)]-mu4-1,2,4,5-benzenetetracarboxylato-kappa4O1:O2:O3:O4].
abstract: In the title complex, [Cu(2)(C(10)H(2)O(8))(C(10)H(8)N(2))(2)](n), the Cu(II) cation has a four-coordinated environment, completed by two carboxyl O atoms belonging to two 1,2,4,5-benzenetetracarboxylate anions (TCB(4-)) and two N atoms from one 2,2'-bipyridine (2,2'-bipy) ligand, forming a distorted square-planar geometry. The [Cu(2,2'-bipy)](2+) moieties are bridged by TCB(4-) anions, which lie about inversion centres, forming an infinite one-dimensional coordination polymer with a double-chain structure along the a axis. A two-dimensional network structure is formed via a face-to-face pi-pi interaction between the 2,2'-bipy rings belonging to two adjacent double chains, at a distance of approximately 3.56 A.
authors.affiliation: Department of Chemistry and Materials Science, Wenzhou Normal College, Wenzhou 325027, People's Republic of China. hp_xiao@wznc.zj.cn
authors.forename: Hong-Ping
authors.initials: HP
authors.lastname: Xiao
authors.forename: Xin-Hua
authors.initials: XH
authors.lastname: Li
authors.forename: Ji-Xin
authors.initials: JX
authors.lastname: Yuan
authors.forename: Mao-Lin
authors.initials: ML
authors.lastname: Hu