Bis(-biphenyl-2,2'-dicarboxylato)bis[(2,2'-bipyridine)copper(II)] tetrahydrate

The title compound, [Cu2(C14H8O4)2(C10H8N2)2]·4H2O, contains a centrosymmetric binuclear copper(II) complex, with Cu⋯Cu = 5.6865 (16) A. The Cu atom displays a cis-CuN2O2 square-planar geometry, although two long (>2.6 A) Cu⋯O contacts complete a distorted cis-CuN2O4 octa­hedron. The crystal packing is consolidated by O—H⋯O hydrogen bonds to form infinite chains. One water molecule is disordered over two sites, with occupancy factors of ca 0.7 and 0.3.