An octa­nuclear zinc(II) complex with 6,6′-dihydr­oxy-2,2′-[1,2-phenyl­enebis(nitrilo­methyl­idyne)]diphenol

The asymmetric unit of the title compound, tetra­aqua­tetrakis­{μ(3)-6,6′-di­oxido-2,2′-[1,2-phenyl­enebis(nitrilo­methyl­idyne)]diphenolato}octa­zinc(II) dimethyl sulfoxide tetra­solvate dihydrate, [Zn(8)(C(20)H(12)N(2)O(4))(4)(H(2)O)(4)]·4C(2)H(6)OS·2H(2)O, contains one quarter of a Zn(II) octa­nuclear complex with [Image: see text] symmetry, one dimethyl sulfoxide mol­ecule and one half of a water mol­ecule which lies on a twofold rotation axis. The Zn(II) atoms of the octa­nuclear complex have two different five-coordinate environments, viz. ZnN(2)O(3) and ZnO(5). All eight Zn(II) centers adopt a distorted square-pyramidal coordination; four Zn(II) ions have the N(2)O(2) tetra­dentate Schiff base ligand bound in a basal plane and the coordinated water mol­ecule occupying the apical site, while the remaing four Zn(II) ions are bound by five O atoms from three Schiff base ligands. In the crystal structure, Zn(II) complex mol­ecules, coordinated and uncoord­inated water mol­ecules and dimethyl sulfoxide mol­ecules are linked via O—H⋯O and C—H⋯O hydrogen bonds and C—H⋯π inter­actions, forming a three-dimensional framework.