On the magnetic properties of covalent XY 6 complexes

An account is given of present ideas about the electron orbits in octahedral complexes containing 4d and 5d transition elements, with particular reference to paramagnetic resonance. The complex is treated by the method of molecular orbitals with the assumption that the magnetic carriers are partly in central d-orbits and partly in pπ-orbits round the outer nuclei. This is shown to lead to a reduction in the orbital g-factor and to the possibility of observing the hyperfine structure from the outer nuclei, thus testing the initial assumptions.