Poly[[tris­(μ-4,4′-bipyridine-κ²N:N′)bis­(μ-L-lysinato-κ³N¹,O¹:O^1′)dizinc(II)] tetra­nitrate 0.6-hydrate dimethyl­formamide disolvate]

In the title compound, {[Zn₂(C₆H₁₄N₂O₂)₂(C₁₀H₈N₂)₃](NO₃)₄·0.6H₂O·2C₃H₇NO}_n, the Zn^II ion is six-coordinated with a distorted octa­hedral geometry by two carboxyl­ate O atoms and one amino N atom from two L-lysinate (L-lys) ligands, and three N atoms from three 4,4′-bipyridine (4,4′-bipy) ligands. The Zn^II ions are connected by the carboxyl­ate groups of the L-lys ligands in the a-axis direction and the bridging 4,4′-bipy ligands in the b- and c-axis directions, forming a three-dimensional cationic framework with channels along [100]. The nitrate anions and solvent water and dimethyl­formamide (DMF) mol­ecules are located in the channels and linked to the cationic framework by N—H...O and O—H...O hydrogen bonds. The occupancy of the water mol­ecule was fixed at 0.6. One of the DMF mol­ecules is disordered over two sets of sites, with an occupancy ratio of 0.632:0.368 (11).

Poly[di-μ₃-hy­droxy[μ₄-5-(4-carb­oxy­phen­yl)pyridine-2-carboxyl­ato-κ⁵N,O²:O^2′:O⁴:O^4′]dicadmium]

The asymmetric unit of the title polymeric complex, [Cd₂(C₁₃H₇NO₄)(OH)₂]_n, consists of two independent Cd^II atoms, one 5-(4-carb­oxy­phen­yl)pyridine-2-carboxyl­ate ligand and two hy­droxy groups. One Cd^II atom is six-coordinated by two O atoms from two ligand mol­ecules and by four μ₃-OH groups in a distorted trigonal–prismatic geometry. The other is five-coordinated by one N and two O atoms from two ligands and by two μ₃-OH groups, forming a distorted square-pyramidal geometry. The two independent Cd^II atoms are connected by the ligand mol­ecules and the OH groups into a three-dimensional framework. O—H...O hydrogen bonds between the OH groups and the carboxyl­ate O atoms are observed.