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Direct experimental measurement of donation/back-donation in unsaturated hydrocarbon bonding to metals
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2000 (English)In: Journal of the American Chemical Society, ISSN 0002-7863, E-ISSN 1520-5126, Vol. 122, no 49, 12310-12316 p.Article in journal (Refereed) Published
Abstract [en]

Using resonant and off-resonant X-ray emission spectroscopy, in combination with ground-state density functional calculations, we examine the electronic structure of chemisarbed ethylene and benzene on thr Cu(110) surface to investigate the suitability of the donation/back-donation bonding model given by Dewar(1) and Chart and Duncanson(2) (DCD) for the interaction of unsaturated hydrocarbons with metal surfaces. We give an experimental verification of the DCD model and find donation/back-donation to be twice as large for ethylene as for benzene. In particular, the degree of sigma-pi mixing (rehybridization) is found to correspond to the amount of donation/back-donation, which is put in relation to the aromatic and nonaromatic pi characters of benzene and ethylene, respectively.

Place, publisher, year, edition, pages
2000. Vol. 122, no 49, 12310-12316 p.
Keyword [en]
ray-emission-spectroscopy, surface chemical-bond, 2-photon photoemission, electronic-structure, benzene, cu(110), chemisorption, ethylene, adsorbates, molecules
Identifiers
URN: urn:nbn:se:kth:diva-20225DOI: 10.1021/ja0016710ISI: 000165866400029OAI: oai:DiVA.org:kth-20225DiVA: diva2:338918
Note
QC 20100525Available from: 2010-08-10 Created: 2010-08-10 Last updated: 2017-12-12Bibliographically approved

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Luo, YiÅgren, Hans

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