Comments on the interaction of copper(II) chelates with chloroform as observed in the electron paramagnetic resonance spectra

Abstract

Re-examination of the e.p.r. spectra of copper(II) bisacetylacetonate in chloroform–toluene glasses demonstrates that a recent suggestion, that chloroform interacts strongly with the chelate metal site, is incorrect. Solvent impurities are found responsible for the previously reported e.p.r. spectrum. The anisotropic e.p.r. parameters for copper(II) acetylacetonate and its ethanol adduct are reported.