Ligand field splittings in non-cubic complexes. Part II. Copper(II)–chlorine systems

Abstract

A simple empirical theory, taking into account σ- and π-bonding and electrostatic effects, is applied to the d–d spectra of tetragonal and trigonal bipyramidal chloro-complexes of copper(II). A total of eight bands observed in three compounds can be satisfactorily fitted to a single freely chosen parameter. The theory predicts the relative energies of the d-orbitals as d_x²–y² > d_xy > d_z² > d_{xz, yz} for the tetragonal compounds and d_z² > d_{xy, x²–y²} > d_{xz, yz} in the trigonal bipyramidal case.