Poly[[tris­(N,N-dimethyl­formamide)(μ(4)-5-nitro­isophthalato)(μ(3)-5-nitro­isophthalato)dicobalt(II)] N,N-dimethyl­formamide monosolvate]

In the polymeric title compound, [Co(2)(C(3)H(7)NO)(3)(C(8)H(3)NO(6))(2)]·C(3)H(7)NO, one 5-nitro­isophthalate dianion has its two carboxyl­ate groups chelating to one Co(II) atom while simultaneously coordinating to another metal atom in a μ(4)-bridging mode. The other 5-nitro­isophthalte dianion has one carboxyl­ate group chelating to a metal atom whereas the other bridges two metal atoms in a μ(3)-bridging mode. Both metal atoms show an octa­hedral coordination. The polymer adopts a layer motif, with the lattice dimethyl­formamide mol­ecules occupying the space between adjacent layers.