catena-Poly[[triaquacopper(II)]-μ₂-furan-2,5-dicarboxyl­ato-κ⁴O¹,O²:O²,O^2′]

In the title compound, [Cu(C₆H₂O₅)(H₂O)₃]_n, an infinite chain is formed along [001] by linking of the Cu(OH₂)₃O₄ cluster with one carboxyl­ate group of the furan-2,5-dicarboxyl­ate ligand. Adjacent chains are linked by O_water—H...O hydrogen-bonding inter­actions. The Cu(OH₂)₃O₄ cluster displays a penta­gonal bipyrimadal geometry with two weak coordinations [Cu—O_furan = 2.790 (2) Å) and Cu—O_{carboxyl­ate} = 2.684 (2) Å] and two water mol­ecules located in axial positions.

catena-Poly[(triaqua­zinc)-μ-furan-2,5-dicarboxyl­ato-κ³O²:O²,O^2′]

In the crystal structure of the title compound, [Zn(C₆H₂O₅)(H₂O)₃]_n, an infinite chain is formed along [001] by linking of the Zn(H₂O)₃ entities with one carboxyl­ate group of the furan-2,5-dicarboxyl­ate ligand. Adjacent chains are linked by O_water—H...O hydrogen-bonding inter­actions. The Zn(H₂O)₃O₃ polyhedron displays a distorted octa­hedral geometry with one weak Zn—O_{carboxyl­ate} coordination [2.433 (8) A°] and two water mol­ecules located in axial positions. Except for one of the axial water molecules and two adjacent H atoms, the other atoms (including H atoms) possess site symmetry m.

catena-Poly[(aqua­dimethano­lzinc)-μ-furan-2,5-dicarboxyl­ato-κ³O²:O²,O^2′]

In the crystal structure of the title compound, [Zn(C₆H₂O₅)(CH₃OH)₂(H₂O)]_n, an infinite chain is formed along the b axis by linking of the Zn(OH₂)(CH₃OH)₂ unit with one carboxyl­ate group of the furan-2,5-dicarboxyl­ate ligand. The Zn^II ion is in a distorted octa­hedral environment with one weak coordination [Zn—O_{carboxyl­ate} = 2.565 (3) Å] and two meth­anol mol­ecules located in axial positions. In the chain, O_water—H...O hydrogen bonds are present, while adjacent chains are linked by O_methanol—H...O hydrogen bonds into a layer parallel to (10-2).

catena-Poly[[[aqua­bis­(1H-imidazole-κN³)copper(II)]-μ-furan-2,5-di­car­boxylato-κ²O²:O⁵] trihydrate]

In the title cooridnation polymer, {[Cu(C₆H₂O₅)(C₃H₄N₂)₂(H₂O)]·3H₂O}_n, an infinite chain is formed along [001] by linking of the Cu(C₃N₂H₄)₂(H₂O) entities with two bridging monodentate carboxyl­ate groups of two different furan-2,5-dicarboxyl­ate dianions. The geometry of the Cu²⁺ ion is a square-based pyramid with the water atom in the apical position and the ligand O and N atoms in a trans orientation. The dihedral angle between the imidazole planes is 83.96 (14)°. O_w–H...O and N_i–H...O (w = water and i = imidazole) hydrogen bonds help to establish the packing.

catena-Poly[[(1,10-phenanthroline-κ²N,N′)zinc]-μ-furan-2,5-dicarboxyl­ato-κ⁴O²,O^2′:O⁵,O^5′]

In the title coordination polymer, [Zn(C₆H₂O₅)(C₁₂H₈N₂)]_n, an infinite chain is formed along [010] by linking the chelated {Zn(phen)} entities (phen is 1,10-phenanthroline) with two carboxyl­ate groups of the furan-2,5-dicarboxyl­ate ligand. The Zn^II atom shows trigonal–prismatic coordination.