Poly[bis­(μ(2)-N,N-di­methyl­formamide-κ(2) O:O)bis­(μ(4)-thio­phene-2,5-di­carboxyl­ato-κ(4) O:O′:O′′:O′′′)dicobalt(II)]

The asymmetric unit of the title three-dimensional metal–organic hybrid compound, [Co(2)(C(6)H(2)O(4)S)(2)(C(3)H(7)NO)(2)]( n ), comprises two cobalt(II) cations, one residing on a twofold axis and the other on a centre of inversion, one thio­phene-2,5-di­carboxyl­ate (tdc(2−)) ligand and one coordinating di­methyl­formamide (DMF) solvent mol­ecule. Both of the cobalt(II) cations exhibit an octa­hedral coordination environment from the four carboxyl O atoms of the tdc(2−) anions in a μ (4)-κ (1):κ (1):κ (1):κ (1) fashion and two O atoms from DMF. A pair of carboxyl O atoms and one DMF molecule connect the adjacent cobalt(II) cations into an infinite chain, leading to a rod-spacer framework with rhombus-window channels, yet no residual solvent-accessible voids are present because the coordinating DMF molecules are oriented into the potential channels. [Image: see text]