Poly[bis-(μ-,-di-methyl-formamide-κ :)bis-(μ-thio-phene-2,5-di-carboxyl-ato-κ :':'':''')dicobalt(II)].

The asymmetric unit of the title three-dimensional metal-organic hybrid compound, [Co(CHOS)(CHNO)] , comprises two cobalt(II) cations, one residing on a twofold axis and the other on a centre of inversion, one thio-phene-2,5-di-carboxyl-ate (tdc) ligand and one coordinating di-methyl-formamide (DMF) solvent mol-ecule. Both of the cobalt(II) cations exhibit an octa-hedral coordination environment from the four carboxyl O atoms of the tdc anions in a - : : : 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.