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In the title hydrated coordination polymer, {[Zn(C6H2O5)(C10H8N2)(H2O)]·2H2O}n, an infinite [1-10] chain is formed by the linking of [Zn(C10H8N2)(H2O)]2+ entities by bridging, monodentate furan-2,5-dicarboxyl­ate dianionic linkers. The Zn2+ coordination geometry is a trigonal bipyramid, with one N atom (from 2,2′-bipyridine) and one O atom (from the bridging dianion) in the axial positions. For each ZnII atom, the dihedral angle between the furan ring of its coordinated bridging ligand and its coordinated bipyridine ring system is 87.19 (8)°. O—H...O hydrogen bonds involving both the coordinated and uncoordinated water mol­ecules generate a layer motif parallel to (001).

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The asymmetric unit of the title compound, {[Cu2(C6H2O5)2(C12H8N2)2(H2O)3]·C3H7NO}n, contains two CuII atoms, two furan-2,5-dicarboxyl­ate (L) ligands, two 1,10-phenanthroline (phen) ligands, three coordinating water mol­ecules and one N,N-dimethyl­formamide solvent mol­ecule. Each CuII atom is coordinated by two N atoms from one phen ligand, two O atoms from two L ligands and two water mol­ecules in a distorted octa­hedral geometry. The main difference between the environments of the two independent Cu atoms is in the Cu—Owater distances, which are 2.415 (2) and 2.639 (2) Å for one CuII atom and 2.3560 (19) and 2.911 (4) Å for the other. Ligands L and one independent water mol­ecule bridge the CuII atoms, forming corrugated polymeric layers parallel to the ab plane. Inter­molecular O—H...O and C—H...O hydrogen bonds consolidate the crystal packing.
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