Aqua­[2,2′-(propane-1,3-di­yl)bis­(5-car­boxy-1H-imidazole-4-carboxyl­ato)-κ(4) N (3),O (4):N (3′),O (4′)](pyridine-κN)cobalt(II)–4,4′-bipyridine (1/1)

In the title compound, [Co(C(13)H(10)N(4)O(8))(C(5)H(5)N)(H(2)O)]·C(10)H(8)N(2), the asymmetric unit comprises half a Co(II) complex located on a mirror plane and half a cocrystallized mol­ecule of 4,4′-bipyridine located on an inversion center. The Co(II) ion is six coordinate, with distorted octa­hedral geometry, ligated by two N atoms and two O atoms from a 2,2′-(propane-1,3-di­yl)bis­(5-carboxy-1H-imidazole-4-carboxyl­ate) dianion, one N atom from a pyridine mol­ecule and one coordinating water mol­ecule. The Co—O bond lengths range from 2.076 (2) to 2.1441 (15) Å, while the Co—N bond lengths are 2.138 (3) and 2.1515 (17) Å. A two-dimensional network of N—H⋯O and O—H⋯N hydrogen bonds stabilizes the crystal packing. There are π–π inter­actions between the bipyridine and imidazole rings [centroid–centroid distance = 3.7694 (4) Å]. The propane-1,3-diyl group is disordered over two conformations, with refined occupancies of 0.755 (8) and 0.245 (8).