COPPER(II) COORDINATION COMPOUNDS: CLASSIFICATION AND ANALYSIS OF CRYSTALLOGRAPHIC AND STRUCTURAL DATA. V. POLYMERIC COMPOUNDS

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.

Key Words:

• Review
• copper(II)
• crystallography
• structures
• polymers