THEORETICAL STUDY OF CHEMICAL SHIFT IN CO3+(D6) COMPOUNDS

The NMR chemical shifts of a wide range of diamagnetic cobalt compounds have been interpreted by extending the basic theory of Griffith and Orgel to include calculations of spin-orbit coupling interaction, configurational mixing, bonding effects, and the distortion interaction. The important terms are the bonding effects and configurational mixing. The results tend to indicate a large quenching of the orbital momentum, resulting from a relatively large transfer of spin to the ligands. The value of the quenching within each of the three series of ligands appears to be constant.