An electron spin resonance study of crown ethers containing copper(II), with a dz2 ground state, and silver atoms
Abstract
Electron spin resonance spectra of complexes of copper(II) chloride or copper(II) bromide with crown ethers exhibit hyper-fine coupling to two equivalent halogen atoms and have one g value very close to 2 showing that the ground state is A1g(dz2). γ-Irradiation of the complex of silver perchlorate with crown ether in toluene or benzene yields Ag0 centres in the crown ether.