title: Poly[[(μ(2)-benzene-1,4-dicarboxyl-ato-κO,O:O,O)(μ(2)-di-4-pyridyldiazene-κN:N)cobalt(II)] N,N-dimethyl-formamide disolvate hemihydrate].
abstract: In the title compound, {[Co(C(8)H(4)O(4))(C(10)H(8)N(4))]·2C(3)H(7)NO·0.5H(2)O}(n), the Co(II) atom is six-coordinated by four O atoms from two benzene-1,4-dicarboxyl-ate (H(2)bdc(2-)) groups and two N atoms from two 4,4'-azopyridine (4,4'-azpy, or di-4-pyridyldiazene) ligands, leading to a distorted octa-hedral geometry. The structure consists of two-dimensional corrugated sheets with a 4(4) topology in an …ABAB… packing pattern stacking along the a axis. The separation of the adjacent corrugated sheets is ca. 8.561 (2)  Å (Co⋯Co distance) along the a axis. The uncoordinated water molecule is half-occupied. The crystal structure is stabilized by O-H⋯N and C-H⋯O hydrogen-bonding inter-actions.
authors.affiliation: School of Material Science and Engineering, Jiangsu University of Science and Technology, Zhenjiang 212003, People's Republic of China.
authors.forename: Chao-Xia
authors.initials: CX
authors.lastname: Chu
authors.forename: Ying
authors.initials: Y
authors.lastname: Zhang
authors.forename: Hu
authors.initials: H
authors.lastname: Zhou
authors.forename: Ai-Hua
authors.initials: AH
authors.lastname: Yuan