Bis(3,5-dicarboxy­benzoato-κ²O,O′)(1,10-phenanthroline)cobalt(II)

The title mol­ecule, [Co(C₉H₅O₆)₂(C₁₂H₈N₂)] or [Co(H₂BTC)₂(phen)] (BTC = benzene-1,3,5-tricarboxyl­ate and phen = 1,10-phenanthroline), has crystallographic twofold symmetry. The Co^II atom has a coordination geometry that is inter­mediate between octa­hedral and trigonal prismatic. In the crystal structure, mol­ecules are connected via O—H...O hydrogen bonds [O...O = 2.621 (4)–2.684 (4) Å] to form a three-dimensional network.