Alteration of primary alcohol reaction pathways on Rh(111). Fluorination blocks oxametallacycle formation
- Univ. of Delaware, Newark, DE (United States)
Temperature programmed desorption (TPD) and high-resolution electron energy loss spectroscopy (HREELS) studies of 2,2,2-trifluoroethanol on Rh(111) were performed in order to determine if the oxametallacycle-mediated pathway for ethanol decarbonylation could be circumvented by replacement of H with F at the {beta}-carbon. Reaction of 2,2,2-trifluoroethanol produced trifluoroacetyl fluoride, CO, HF, and H{sub 2}. Trifluoroacetaldehyde could also be desorbed as a product of trifluoroethanol decomposition under certain conditions; the observation of this product and of trifluoroacetyl fluoride indicates that aldehyde and acyl intermediates, rather than metallacycles, are formed in the course of this reaction. These results demonstrate that oxametallacycle formation from alcohols on Rh(111) can be blocked by complete substitution at the {beta}-carbon. 24 refs., 4 figs., 1 tab.
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- FG02-84ER13290
- OSTI ID:
- 45011
- Journal Information:
- Langmuir, Journal Name: Langmuir Journal Issue: 4 Vol. 11; ISSN LANGD5; ISSN 0743-7463
- Country of Publication:
- United States
- Language:
- English
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