Poly[(μ(3)-5-amino­isophthalato-κ(4) O,O′:O′′:O′′′)[μ(2)-1,2-bis­(4-pyrid­yl)ethane-κ(2) N:N′]cobalt(II)]

In the title compound, [Co(C(8)H(5)NO(4))(C(12)H(12)N(2))](n), the Co(II) ion presents a distorted CoO(4)N(2) octa­hedral coordination geometry, formed by three 5-amino­isophthalate dianions and two 1,2-bis­(4-pyrid­yl)ethane ligands. One carboxyl­ate group of the 5-amino­isophthalate dianion chelates a Co cation and the other carboxyl­ate group bridges the other two Co cations, while the terminal N atoms of the 1,2-bis­(4-pyrid­yl)ethane ligand coordinate the neighboring Co cations, forming a two-dimensional polymeric architecture. Two pyridine rings of the 1,2-bis­(4-pyrid­yl)ethane ligand are twisted to each other with a dihedral angle of 50.94 (16)°. Weak C—H⋯O hydrogen bonding and N—H⋯π inter­actions are observed in the crystal structure. A void of 69 (5) Å(3) is present in the crystal structure, but no solvent mol­ecule can be located reasonably.