[(Pyridine-2,6-dicarboxyl­ato)copper(II)]-μ-(pyridine-2,6-dicarboxyl­ato)-[bis­(ethyl­enediamine)­copper(II)]-μ-(pyridine-2,6-dicarboxyl­ato)-[(pyridine-2,6-dicarboxyl­ato)copper(II)] ethyl­enediamine monosolvate tetra­hydrate

The title compound, [Cu(3)(C(7)H(3)NO(4))(4)(C(2)H(8)N(2))(2)]·C(2)H(8)N(2)·4H(2)O, was obtained by the reaction of copper(II) acetate dihydrate with pyridine-2,6-dicarb­oxy­lic acid (H(2)dipic) and ethyl­enediamine (en) in an aqueous solution. All of the Cu(II) atoms in the trinuclear centrosymmetric title complex are six-coordinated in a distorted octa­hedral geometry with N(2)O(4) and N(4)O(2) environments for the outer and central Cu(II) atoms, respectively. Various inter­actions, including numerous O—H⋯O and C—H⋯O hydrogen bonds and C—O⋯π stacking of the pyridine and carboxyl­ate groups [O⋯centroid distances = 3.669 (2) and 3.668 (2) Å] are observed in the crystal structure.