Studies in eight-co-ordination. Part III. The single-crystal electronic spectrum, electron spin resonance, and magnetic anisotropy of, and crystal-field in, tetra-(6-aminohexanoic acid)copper(II) diperchlorate

Abstract

The single-crystal polarised electronic spectra, e.s.r., and magnetic anisotropy of tetra-(6-aminohexanoic acid)copper(II) diperchlorate are reported. These properties are interpreted by use of a point-charge crystal-field model and are seen to be consistent with the relative orbital energies, d_xy > d_x²–y² > d_z² > d_{xz yz}. The crystal-field parameters obtained are shown to agree closely with those for CaCu(AcO)₄,6H₂O when allowance is made for the different Cu–O distances involved.