Theoretical Study of the Chemical Shift in Co3+ (d6) Compounds

Abstract
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.

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