Bis(μ-3,5-dinitro-2-oxidobenzoato)-κ(3) O (1),O (2):O (1);κ(3) O (1):O (1),O (2)-bis[aqua­(2-phenyl-1,3,7,8-tetra­azacyclo­penta­[l]phenanthrene-κ(2) N (7),N (8))cobalt(II)]

In the title compound, [Co(2)(C(7)H(2)N(2)O(7))(2)(C(19)H(12)N(4))(2)(H(2)O)(2)], the Co(II) atom is six-coordinated by two N atoms from a 2-phenyl-1H-1,3,7,8,-tetraaza­cyclo­penta­[l]phenanthrene (L) ligand, three O atoms from two 3,5-dinitro-2-oxidobenzoate (3,5-dinitro­salicylate or DNSA) ligands and one O atom from a water mol­ecule in a distorted octa­hedral geometry. The Co(II) atoms are bridged by two carboxyl­ate O atoms from two DNSA ligands, forming a centrosymmetric dinuclear structure. Neighbouring dinuclear units inter­act with each other through two types of π–π inter­actions between the L ligands [shortest centroid–centroid distance = 3.646 (3) Å] and between the L and DNSA ligands [shortest atom-to-centroid distance = 3.794 (3) Å]. N—H⋯O, O—H⋯N and O—H⋯O hydrogen bonds are observed, which lead to a three-dimensional structure.