Poly[[hexa­aqua­sesqui(μ-benzene-1,2,4,5-tetra­carboxyl­ato)dicopper(II)disodium] monohydrate]

In the title compound, {[Cu(2)Na(2)(C(10)H(2)O(8))(1.5)(H(2)O)(6)]·H(2)O}(n), the Cu(2+) ion is hexa­coordinated by five O atoms from benzene-1,2,4,5-tetra­carboxyl­ate (btec(4−)) ligands and one water mol­ecule. The Na(+) ion is also hexa­coordinated, by four O atoms from btec(4−) ligands and two water mol­ecules. One of the two btec(4−) mol­ecules sits on a crystallographic inversion centre. CuO(6) and NaO(6) octa­hedra are connected, forming bi-dimensional layers. These layers, which extend parallel to the ac plane, are further inter­connected by μ(10)- or μ(11)-bridging btec(4−) ligands and by O—H⋯O hydrogen bonds, involving both btec(4−) ligands and water mol­ecules, forming a three-dimensional network.