HEPTACOORDINATE CU-II IN NZIMIDAZOLE-N-3)COPPER(II)MU-ADIPATO-O,O'O'',O''']

The title compound, [Cu(C6H8O4)(C7H6N2)(2)(H2O)], has been synthesized and its crystal structure determined by single-crystal X-ray diffract ion at room temperature. The seven-coordinate Cu-II complexes adopt a C-2 elongated tetragonal pyramidal geometry with double-capped base, T he Cu atoms are located on the twofold axes and are connected by bridg ing tetradentate adipate ions to form polymeric chains. In the base of the coordination polyhedron, the two short Cu-N bonds are 2.007 (2) A ngstrom in length and the two short Cu-O bonds are 2.010 (2) Angstrom. The length of the apical Cu-H2O bond is 2.245 (4) Angstrom; the lengt hs of the two long semicoordinate Cu-O bonds which complete the seven coordination, are 2.930 (2) Angstrom. The intermolecular hydrogen bond s and geometry of the carboxylate group are discussed.