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Revisiting the fundamental nature of metal‐ligand bonding : an impartial and automated fitting procedure for angular overlap model parameters
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Buchhorn, Moritz, Deeth, Robert J. and Krewald, Vera (2022) Revisiting the fundamental nature of metal‐ligand bonding : an impartial and automated fitting procedure for angular overlap model parameters. Chemistry – A European Journal, 28 (9). e202103775. doi:10.1002/chem.202103775 ISSN 1521-3765.
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Official URL: http://dx.doi.org/10.1002/chem.202103775
Abstract
The properties and reactivities of transition metal complexes are often discussed in terms of Ligand Field Theory (LFT), and with ab initio LFT a direct connection to quantum chemical wavefunctions was recently established. The Angular Overlap Model (AOM) is a widely used, ligand-specific parameterization scheme of the ligand field splitting that has, however, been restricted by the availability and resolution of experimental data. Using ab initio LFT, we present here a generalised, symmetry-independent and automated fitting procedure for AOM parameters that is even applicable to formally underdetermined or experimentally inaccessible systems. This method allows quantitative evaluations of assumptions commonly made in AOM applications, for example, transferability or the relative magnitudes of AOM parameters, and the response of the ligand field to structural or electronic changes. A two-dimensional spectrochemical series of tetrahedral halido metalates ([MIIX4]2−, M=Mn−Cu) served as a case study. A previously unknown linear relationship between the halide ligands’ chemical hardness and their AOM parameters was found. The impartial and automated procedure for identifying AOM parameters introduced here can be used to systematically improve our understanding of ligand–metal interactions in coordination complexes.
Item Type: | Journal Article | ||||||||
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Subjects: | Q Science > QD Chemistry T Technology > TS Manufactures |
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Divisions: | Faculty of Science, Engineering and Medicine > Science > Chemistry | ||||||||
Library of Congress Subject Headings (LCSH): | Metal bonding, Ligand field theory, Transition metal complexes, Transition metals | ||||||||
Journal or Publication Title: | Chemistry – A European Journal | ||||||||
Publisher: | Wiley | ||||||||
ISSN: | 1521-3765 | ||||||||
Official Date: | 17 February 2022 | ||||||||
Dates: |
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Volume: | 28 | ||||||||
Number: | 9 | ||||||||
Number of Pages: | 14 | ||||||||
Article Number: | e202103775 | ||||||||
DOI: | 10.1002/chem.202103775 | ||||||||
Status: | Peer Reviewed | ||||||||
Publication Status: | Published | ||||||||
Access rights to Published version: | Open Access (Creative Commons) | ||||||||
Date of first compliant deposit: | 15 March 2022 | ||||||||
Date of first compliant Open Access: | 18 March 2022 |
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