Paramagnetic Resonance in Palladium and Platinum Group Compounds

J. H. E. Griffiths, J. Owen, I. M. Ward
1953 Proceedings of the Royal Society A  
The paramagnetic resonance method has been applied to investigate the magnetic pro perties of complexes containing elements of the 4d and 5d groups. It is shown that the resonance results, and such information as is available from susceptibility measurements, can be accounted for to a good approximation by assuming that there are either covalent cr-bonds or very strong electrostatic bonds in the complex (Van Vleck 1935). In the case of db complexes, however, accurate measurements of the
more » ... ents of the spectroscopic splitting factors show small discrepancies with this theory. Furthermore, an anomalous hyperfine structure is observed for the complex [IrCl6]2", which displays lines arising not only from the Ir nucleus, but also from the surrounding Cl nuclei. These effects are ascribed to the presence of weak 7r-bonds, in addition to <r-bonds, in the complex (Stevens 1953). In magnetically con centrated salts of the 5d group, it is found that there is strong exchange interaction between paramagnetic neighbours.
doi:10.1098/rspa.1953.0165 fatcat:bjxouyto5vfxnlc5tjfqhoayja