A dimeric copper(II) complex of an alpha-hydroxylated acid: [Cu(C14H8O3)-(C9H7N)(H2O)](2).2C(3)H(7)NO.2H(2)O

The structure of bis[mu-(9-hydroxy-1:2 kappa(2)O)-9-fluorenecarboxylato(2-)]-1 kappa O;2 kappa O-bis[aqua(quinoline-kappa N]-copper(II)] bis(dimethylformamide) dihydrate has been determined by single-crystal X-ray diffraction. The binuclear Cu-II unit comprises a pair of Cu atoms linked by two hydroxy O-atom bridges, The coordination polyhedron around each Cu atom is a distorted square pyramid, the basal plane consisting of one N atom from the quinoline ligand, one carboxy O atom and two bridging O atoms from two alpha-hydroxylated acid ligands, while the axial coordination site is occupied by an O atom of the coordinated water molecule with a Cu-O bond length of 2.424 (4) Angstrom.