E.P.R of Ni(I) radiolytically produced in Ni(II) doped Cd(imidazole)3 SO<inf>4</inf>H<inf>2</inf>O

Single crystal E.P.R. of y-irradiated Ni(II) doped Cd(imidazole)3S04H20 is reported. Based on the principal g values, their direction cosines and site symmetry the nickel species obtained is inferred to be Ni(I). The magnetic parameters of Ni(I) are compared with isoelectronic Cu(II) in the same host lattice. Whilst both ions have the same formal dx2-y2 ground state the metal-ligand bonding was found to be more covalent for Cu(II). © 1986, Taylor & Francis Group, LLC.