Title: Mechanisms of catalytic dehydrogenation of alkanes by rhodium clusters Rhn+ probed by isotope labelling
Authors : Adlhart, Christian
Uggerud, Einar
Published in : International Journal of Mass Spectrometry
Volume(Issue) : 249 - 250
Pages : 191
Pages to: 198
Publisher / Ed. Institution : Elsevier
Publisher / Ed. Institution: Amsterdam
Issue Date: 20-Jan-2006
License (according to publishing contract) : Licence according to publishing contract
Type of review: Peer review (Publication)
Language : English
Subjects : Metal cluster; Ion molecule reaction; Deuterium labelling; Nanotechnology
Subject (DDC) : 540: Chemistry
Abstract: The regioselectivity for the dehydrogenation of alkanes by rhodium clusters was investigated by reacting Rhn+, n = 1-20, with the isotopically labelled alkanes ethane-1,1,1-d3 and propane-1,1,1,3,3,3-d6. For Rh+ reacting with propane a clear preference for a 1,2- over a 1,1- and 1,3-mechanism was obsd. For larger clusters, hydrogen scrambling is faster than hydrogen elimination, which essentially leads to statistical formation of the neutrals H2, HD, and D2. Isotope scrambling with D2 was also used as a structural probe for the reaction products of rhodium clusters with ethane. The intactness of the C-H bonds was demonstrated for (n > 6). The studies are completed with a detailed kinetic anal. for the reaction of Rh7+ with ethane and ethane/hydrogen and ethane/helium mixts. An over-all picture with efficient C-H bond activation and fast and reversible hydrogen rearrangements emerges on the basis of these expts. Some of the dehydrogenation reactions appear to be reversible.
Departement: Life Sciences und Facility Management
Organisational Unit: Institute of Chemistry and Biotechnology (ICBT)
Publication type: Article in scientific Journal
DOI : 10.1016/j.ijms.2005.12.032
ISSN: 1387-3806
URI: https://digitalcollection.zhaw.ch/handle/11475/2065
Appears in Collections:Publikationen Life Sciences und Facility Management

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