Poly[[(μ(2)-benzene-1,4-dicarboxyl­ato-κ(4) O (1),O (1′):O (4),O (4′))(μ(2)-di-4-pyridyldiazene-κ(2) N (1):N (1′))cobalt(II)] N,N-dimethyl­formamide disolvate hemihydrate]

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-dicarboxyl­ate (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 octa­hedral 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 inter­actions.