catena-Poly­[[[di­aqua(6-carboxy­pyridine-2-carboxyl­ato-κ³N,O,O′)­samarium(III)]-μ-pyridine-2,6-di­carboxyl­ato-κ⁴N,O,O′:O′′] tetrahydrate]

In the title complex, [Sm(C₇H₃O₄)(C₇H₄O₄)(H₂O)₂]·4H₂O, the coordination number of the Sm atom is nine. The pyridine-2,6-di­carboxyl­ate ligand chelates to the Sm atom and bridges to the neighbouring Sm atoms to form infinite chains along the c axis.

Methanol(2-methyl-1H-imidazole-κN³)(pyridine-2,6-di­carboxyl­ato-κ³N,O,O′)copper(II)

In the title compound, [Cu(C₇H₃NO₄)(C₄H₆N₂)(CH₄O)], the Cu atom lies in the centre of an N₂O₂ square plane, and the methanol mol­ecule is apically coordinated. The coordination geometry is best described as distorted square-pyramidal. There are intermolecular hydrogen bonds in the crystal structure, which mediate the formation of layers.