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In the crystal structure of the title compound, [Zn2(C8H4O4)2(C2H6OS)2]·5C2H6OS, four independent carboxyl­ate units of the 1,4-benzene­dicarboxyl­ate groups chelate to two Zn atoms to give rise to —O—C—O—Zn...Zn— rings, the four O atoms around each zinc atom forming a square, above which is a dimeth­yl sulfoxide (DMSO) mol­ecule and below which is the other Zn atom. The bridging mode of the 1,4-benzene­dicarboxyl­ate groups, one of which lies on a general position and the other two on inversion centers, leads to a layer structure having DMSO mol­ecules between the layers. The uncoordinated solvent mol­ecules account for about 80% of the volume of the unit cell.
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