Abstract
After a brief review of the applications of the Mössbauer effect to cyclopentadienyl containing compounds, the chemistry and spectral properties of the various iron carbonyl complexes are described. The electronic properties of a series of trinuclear and tetranuclear organoiron clusters have been investigated through Fenske-Hall self-consistent field molecular orbital calculations, and the results are compared with the Mössbauer effect isomer shifts. A linear correlation is found between the Slater effective nuclear charge, as calculated from the Fenske-Hall partial orbital occupancy factors, and the isomer shift. In these compounds the 4s orbital populations are rather constant. However, thecis andtrans isomers of [CpFe(CO)2]2 have a significantly lower 4s orbital populations. In this case, the reduced 4s population must be accounted for by adding it to the effective nuclear charge to obtain a good correlation with the isomer shift.
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Long, G.J., O'Brien, J.F. A Mössbauer effect study of the bonding in several organoiron carbonyl clusters. Hyperfine Interact 40, 101–110 (1988). https://doi.org/10.1007/BF02049082
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DOI: https://doi.org/10.1007/BF02049082
Keywords
- Iron
- Carbonyl
- Linear Correlation
- Electronic Property
- Spectral Property