title: Poly[tetraaquadi-mu4-malonato-barium(II)zinc(II)].
abstract: The title complex, [BaZn(C3H2O4)2(H2O)4]n, is polymeric, due to the connectivity brought about by each malonate dianion bonding to two different Zn(II) cations and two different Ba(II) cations. The Ba(II) cations, on crystallographic twofold axes, have slightly distorted square-antiprismic coordination, with Ba-O distances ranging from 2.795 (2) to 2.848 (2) A. The Zn(II) cations, which lie on crystallographic centres of symmetry, have distorted octahedral coordination, with Zn-O bonds in the range 2.0364 (19)-2.3248 (18) A. The water molecules participate in extensive O-H...O hydrogen bonding. The structure comprises alternating layers along [100], with one type containing Zn(II) cations and malonate dianions, while the other is primarily composed of Ba(II) cations and water molecules.
authors.affiliation: College of Materials and Chemical Engineering, Tianjin Polytechnic University, Tianjin 300160, People's Republic of China. guomlin@yahoo.com
authors.forename: Ming Lin
authors.initials: ML
authors.lastname: Guo
authors.forename: Chen Hu
authors.initials: CH
authors.lastname: Guo