| Abstract: | Abstract This review classifies almost 600 polymeric Cu(II) compounds. The various geometries are found in increasing number in the order: four-(mostly square-planar) ? five- (mostly square-pyramidal) ? six-coordinate (mostly tetragonal-bipyramidal). The most common ligands are oxygen and nitrogen atoms. The ligands range from mono- to undecadentate. In most examples, apical positions are occupied by oxygen-donor ligands. In general, the mean Cu-L(equatorial) bond length is shorter than the respective Cu-L(apical) bond length. The shortest Cu-Cu distance in the series of four-coordinate derivatives is 2.95 Å, five-coordinate 2.652(2) Å and six-coodinate 2.977(2) Å. Several relationships between the various structural parameters were found and are discussed. |
