ELECTRON-SPIN-RESONANCE STUDY OF ELECTRON-IRRADIATED K3IRCL6 IN A NACL HOST LATTICE - LIGAND-FIELD ANALYSIS

Electron irradiation of the diamagnetic [IrIIInC16]3- ion in a NaCl host lattice produces two paramagnetic species. ESR studies indicate that these slightly different species can be assigned to a [IrIIC16]4- complex, with 5d7 low spin configuration, arising from the capture of an electron in a dz2 orbital. The almost zero value for the quadrupolar interaction and the negative value for the core polarization field per unpaired spin are discussed in terms of a ligand field theory and the group overlap integral for the Arg molecular orbital is calculated from the experimental data. © 1979 Taylor & Francis Ltd.