title: Poly[[tetra-aqua-bis(1H-imidazole-κN)bis-[2-(oxaloamino)benzoato(3-)]dicopper(II)barium(II)] dihydrate].
abstract: In the title coordination polymer, {[BaCu(2)(C(9)H(4)NO(5))(2)(C(3)H(4)N(2))(2)(H(2)O)(4)]·2H(2)O}(n), the Ba(2+) cation is deca-coordinate, ligated by four aqua ligands and four [Cu(C(9)H(4)O(5)N)(C(3)H(4)N(2))] 'complex ligands'. The Cu(II)-containing complex-ligands are bridged by the Ba(2+) cations, resulting in a one-dimensional polymeric chain structure. The crystal structure is maintained via N-H⋯O and O-H⋯O hydrogen bonds. There is one disordered solvent water mol-ecule in the asymmetric unit, with occupancies of 0.44 (2) and 0.56 (2).
authors.affiliation: Institute of Environmental and Municipal Engineering, North China University of Water Conservancy and Electric Power, Zhengzhou 450011, People's Republic of China.
authors.forename: Chongzhen
authors.initials: C
authors.lastname: Mei
authors.forename: Kaihui
authors.initials: K
authors.lastname: Li
authors.forename: Peng
authors.initials: P
authors.lastname: Zhang