A one-dimensional cobalt(II) coordination polymer based on 2,4′-oxydi­benzoic acid: poly[[[di­aqua­bis­[2-(4-carb­oxy­phen­oxy)benzoato-κO¹]cobalt(II)]-μ-4,4′-bi­pyridine-κ²N:N′] dihydrate]

In a new one-dimensional cobalt(II) coordination polymer with 2-(4-carb­oxy­phen­oxy)benzoate (Hoba⁻) and 4,4′-bi­pyridine (bipy) ligands, the Co^II ions are connected by bipy ligands to form an infinite one-dimensional chain. O—H...O hydrogen bonding extends these chains into a two-dimensional supra­molecular architecture.