Abstract
The steric and energetic lone pair effect induced by s-p mixing can be parameterised within the angular overlap model (AOM), as is shown for a series of halide molecules and complexes mainly of the fifth main group (oxidation state +III) with the coordination numbers 3 to 6. The derived effective AOM parameters esp eff, defined for the average bond lengths of the distorted structures, decrease the softer the considered entity is, and seem to be transferable within groups of chemically related species. We base the analysis on results of DFT calculations, using specifically Kohn-Sham MO diagrams in comparison to corresponding many-electron energies. There is definite experimental evidence for s-p and for d-s mixing as well, as is demonstrated by the DFT analysis of spectral data for some model complexes. The equivalence of the vibronic coupling approach on the MO level with the AOM is emphasized; the advantage of the AOM is, however, that angular and radial (bond length) contributions can be cleanly separated.
This is a preview of subscription content, log in via an institution.
Buying options
Tax calculation will be finalised at checkout
Purchases are for personal use only
Learn about institutional subscriptionsPreview
Unable to display preview. Download preview PDF.
Author information
Authors and Affiliations
Corresponding author
Editor information
Rights and permissions
Copyright information
© 2004 Springer-Verlag Berlin Heidelberg
About this chapter
Cite this chapter
Reinen, D., Atanasov, M. (2004). The Angular Overlap Model and Vibronic Coupling in Treating s-p and d-s Mixing – a DFT Study. In: Schönherr, T. (eds) Optical Spectra and Chemical Bonding in Transition Metal Complexes. Structure and Bonding, vol 107. Springer, Berlin, Heidelberg. https://doi.org/10.1007/b96902
Download citation
DOI: https://doi.org/10.1007/b96902
Published:
Publisher Name: Springer, Berlin, Heidelberg
Print ISBN: 978-3-540-00854-5
Online ISBN: 978-3-540-36571-6
eBook Packages: Springer Book Archive