Poly[[tris-(N,N-dimethyl-formamide)(µ(4)-5-nitro-isophthalato)(µ(3)-5-nitro-isophthalato)dicobalt(II)] N,N-dimethyl-formamide 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-nitro-isophthalate dianion has its two carboxyl-ate groups chelating to one Co(II) atom while simultaneously coordinating to another metal atom in a µ(4)-bridging mode. The other 5-nitro-isophthalte dianion has one carboxyl-ate group chelating to a metal atom whereas the other bridges two metal atoms in a µ(3)-bridging mode. Both metal atoms show an octa-hedral coordination. The polymer adopts a layer motif, with the lattice dimethyl-formamide mol-ecules occupying the space between adjacent layers.

3,5-Bis(4-meth-oxy-phen-yl)-4H-1,2,4-triazol-4-amine.

The title compound, C(16)H(16)N(4)O(2), crystallizes with two mol-ecules in the asymmetric unit, which are related by a non-crystallographic centre of inversion. The phenyl-ene rings are twisted out of the mean plane of the triazole ring by 19.3 (1) and 21.4 (1)° for one independent mol-ecule and by 16.3 (1) and 18.1 (1)° for the other mol-ecule. In the crystal, adjacent mol-ecules are linked by amine-triazole N-H⋯N hydrogen bonds, forming chains running along the a axis.