catena-Poly[[[aqua-(pyrazino[2,3-f][1,10]phenanthroline)cadium(II)]-μ-4,4'-ethyl-enedibenzoato] N,N-dimethyl-formamide hemisolvate].

In the title compound, [Cd(C(16)H(10)O(4))(C(14)H(8)N(4))(H(2)O)]·0.5C(3)H(7)NO, the Cd(II) atom is six-coordinated by two N atoms from one pyrazino[2,3-f][1,10]phenanthroline ligand, three carboxyl-ate O atoms from two different 4,4'-ethyl-enedibenzoate ligands, and one water mol-ecule in a distorted octa-hedral environment. The two 4,4'-ethyl-enedibenzoate dianions are located on inversion centres bridging two neighboring Cd(II) centres. O-H⋯O hydrogen-bonding inter-actions further stabilize the crystal structure. The DMF molecule is equally disordered about a center of inversion.