Angular-overlap parameters for tetrahalogeno-complexes of copper(II)and cobalt(II)

Abstract

Single-crystal magnetic susceptibilities and electronic spectra of Cs₂[CuCl₄], Cs₂[CuBr₄], Cs₃[CoCl₄]Cl, Cs₃[CoBr₄]Br, and [NEt₄]₂[NiCl₄] are interpreted within the angular-overlap model for ligand fields. Unambiguous values for σ- and π-bonding parameters are determined by the spectra of the copper complexes. Ranges for these parameter values are obtained from the magnetic moments and zero-field-splitting values of the cobalt complexes.