Poly[[(μ₂-4,4′-bipyridine)(μ₃-5-iso­nicotinamido­isophthalato)cobalt(II)] trihydrate]

In the title compound, {[Co(C₁₄H₈N₂O₅)(C₁₀H₈N₂)]·3H₂O}_n, the Co^II cation is five-coordinated with a slightly distorted trigonal–bipyramidal geometry, and the 5-isonicotinamido­isophthalate ligands link Co^II atoms into a layered structure. These two-dimensional arrays are further pillared by rod-like 4,4′-bipyridine ligands to give a three-dimensional framework with pcu (primitive cubic) topology. The magnetic and adsorption properties of the title compound are also discussed.