Lanthanide population analysis

Okada et al. (1984) assignment of the bands in the 37000-51000cmregion to 4f 5d transition. The spin-orbit splitting was computed as 2200 cm for the 4f state. The Mulliken-population analysis revealed a 4f occupation of 1.01 electron. It was noted by Kotzian et al. (1991a, b) that due to the compactness of the 4f shell, the 4f valence electron of Ce does not contribute to metal-ligand bonding. This is reminiscent of the bonding discussed before for the diatomic lanthanide... 

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