Assignment of pre-edge features in the Ru K-edge X-ray absorption spectra of organometallic ruthenium complexes. Getty, K., Delgado-Jaime, M., U., & Kennepohl, P. Inorg. Chim. Acta, 361(4):1059-1065, 3, 2008. Paper Website doi abstract bibtex The nature of the lowest energy bound-state transition in the Ru K-edge X-ray Absorption Spectra for a series of Grubbs-type ruthenium complexes was investigated. The pre-edge feature was unambiguously assigned as resulting from formally electric dipole forbidden Ru 4d<--1s transitions. The intensities of these transitions are extremely sensitive to the ligand environment and the symmetry of the metal centre. In centrosymmetric complexes the pre-edge is very weak since it is limited by the weak electric quadrupole intensity mechanism. By contrast, upon breaking centrosymmetry, Ru 5p-4d mixing allows for introduction of electric dipole allowed character resulting in a dramatic increase in the pre-edge intensity. The information content of this approach is explored as it relates to complexes of importance in olefin metathesis and its relevance as a tool for the study of reactive intermediates.
@article{
title = {Assignment of pre-edge features in the Ru K-edge X-ray absorption spectra of organometallic ruthenium complexes},
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year = {2008},
keywords = {DFT,SSRL,X-ray Absorption Spectroscopy,olefin metathesis},
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abstract = {The nature of the lowest energy bound-state transition in the Ru K-edge X-ray Absorption Spectra for a series of Grubbs-type ruthenium complexes was investigated. The pre-edge feature was unambiguously assigned as resulting from formally electric dipole forbidden Ru 4d<--1s transitions. The intensities of these transitions are extremely sensitive to the ligand environment and the symmetry of the metal centre. In centrosymmetric complexes the pre-edge is very weak since it is limited by the weak electric quadrupole intensity mechanism. By contrast, upon breaking centrosymmetry, Ru 5p-4d mixing allows for introduction of electric dipole allowed character resulting in a dramatic increase in the pre-edge intensity. The information content of this approach is explored as it relates to complexes of importance in olefin metathesis and its relevance as a tool for the study of reactive intermediates.},
bibtype = {article},
author = {Getty, Kendra and Delgado-Jaime, Mario Ulises and Kennepohl, Pierre},
doi = {10.1016/j.ica.2007.07.029},
journal = {Inorg. Chim. Acta},
number = {4}
}
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