Crystal structure of poly[{μ-N,N′-bis[(pyridin-4-yl)meth­yl]oxalamide}-μ-oxalato-cobalt(II)]

In the polymeric title compound, [Co(C₂O₄)(C₁₄H₁₄N₄O₂)]_n, the Co^II atom is six-coordinated by two N atoms from symmetry-related bis­[(pyridin-4-yl)meth­yl]oxalamide (BPMO) ligands and four O atoms from two centrosymmetric oxalate anions in a distorted octa­hedral coordination geometry. The Co^II atoms are linked by the oxalate anions into a chain running parallel to [100]. The chains are linked by the BPMO ligands into a three-dimensional architecture. In addition, N—H...O hydrogen bonds stabilize the crystal packing.

Crystal structure of poly[aqua­[μ-1,1′-(9,9-dimethyl-9H-fluoren-2,7-di­yl)di-1H-imidazole](μ-naphthalene-1,4-di­carboxyl­ato)nickel(II)]

In the title compound, [Ni(C₁₂H₆O₄)(C₂₁H₁₈N₄)(H₂O)]_n, the Ni^II cation is coordinated by three carboxyl­ate O atoms of two naphthalene-1,4-di­carboxyl­ate anions, one water mol­ecule and two N atoms of two 1,1′-(9,9-dimethyl-9H-fluoren-2,7-di­yl)di-1H-imidazole (DFDI) ligands, giving rise to a slightly distorted octa­hedral geometry. The Ni^II ions are linked by the DFDI ligands into chains, which are further connected by the carboxyl­ate anions into double chains that elongate in the the b-axis direction. These double chains are linked by centrosymmetric pairs of O—H...O hydrogen bonds into layers parallel to (10-1). The asymmetric unit consists of one crystallographically independent Ni^II cation, one carboxyl­ate and one DFDI ligand, as well as of one water mol­ecule, all of them located in general positions.