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

In the title compound, {[Cu₂Na₂(C₁₀H₂O₈)_1.5(H₂O)₆]·H₂O}_n, the Cu²⁺ ion is hexa­coordinated by five O atoms from benzene-1,2,4,5-tetra­carboxyl­ate (btec⁴⁻) ligands and one water mol­ecule. The Na⁺ ion is also hexa­coordinated, by four O atoms from btec⁴⁻ ligands and two water mol­ecules. One of the two btec⁴⁻ mol­ecules sits on a crystallographic inversion centre. CuO₆ and NaO₆ octa­hedra are connected, forming bi-dimensional layers. These layers, which extend parallel to the ac plane, are further inter­connected by μ₁₀- or μ₁₁-bridging btec⁴⁻ ligands and by O—H...O hydrogen bonds, involving both btec⁴⁻ ligands and water mol­ecules, forming a three-dimensional network.