A DESCRIPTION OF LIGAND-FIELD EFFECTS IN THE DI-MU-AZIDO-BIS [(AZIDO(N,N-DIETHYLETHYLENEDIAMINE])COPPER(II)] COMPOUND BY THE SIMPLE OVERLAPMODEL

We present a theoretical description of ligand field effects in the i- mu-azido-bis[{azido(N,N-diethylethyienediamine)} copper(II)] compound by the Simple Overlap Model. The ligand field Hamiltonian is expressed in terms of irreducible tensor operators for an assumed D-3h site sym metry occupied by the copper ion. The ligand field parameters, calcula ted from the available structural data, indicate that the copper ion i s under the influence of a very strong ligand field. The energy of the d-d absorption band is well reproduced phenomenologically by the mode l.