Magnetism, electronic spectra, and structure of transition metal alkoxides. V. Copper(II) methoxides

Abstract

Najor differences in magnetism are observed in the series CuXL where X = -OMe, Cl, Br, and L = -OMe, acac. Cu(OMe), exhibits linear antiferro- magnetism, CuCl(OMe) follows the Curie law with μ_eff 2.0 B.M., and CuBr(OMe) is only feebly paramagnetic. The magnetism of Cu(OMe) acac may be interpreted in terms of a singlet-triplet equilibrium with -J = 725 cm^-1 (2.08 kcal mole^-1).