trans‐μ‐Oxamido‐N,N′‐diethano­ato‐bis­[di­aqua­copper(II)] dihydrate

The title complex, trans‐{μ‐2,2′‐[(1,2‐dioxoethane‐1,2‐diyl)­diimino]­diethano­ato(4−)}bis­[di­aqua­copper(II)] dihydrate, [Cu₂(C₆H₄N₂O₆)(H₂O)₄]·2H₂O, with a three‐dimensional framework, displays a square‐pyramidal coordination geometry. The structure consists of a neutral centrosymmetric binuclear unit in which the ox­amide ligand has a trans geometry, is fully deprotonated and acts in a bis‐tridentate fashion.