Surface organometallic chemistry on metals: Influence of organometallic fragments grafted to the surface of Rh particles on the competitive hydrogenation of terminal and internal double bonds of unsaturated primary alcohols

C. Chupin, J. P. Candy*, Jean-Marie Maurice Basset

*Corresponding author for this work

Research output: Contribution to journalConference articlepeer-review

7 Scopus citations

Abstract

Hydrophobic organotin fragments, grafted to the surface of a rhodium particle can strongly modify the rate of the hydrogenation of internal or terminal carbon-carbon (C-C) double bonds of unsaturated primary alcohols. In this work, the rate of hydrogenation of trans-2-hexenol and 5-hexenol was determined at room temperature under 20 bar of hydrogen in butanol + water (30 + 10) solution for Rh/SiO2 catalysts which were either used unmodified or modified with Sn(n-C4H9)4. It was found that the presence of alkyl groups decreases the ratio between the rate of hydrogenation of the terminal and internal double bond by a factor of 4. These results are explained by the formation of a hydrophobic layer around the modified particle which inhibits the adsorption of the unsaturated alcohol by its internal double bond.

Original languageEnglish (US)
Pages (from-to)15-19
Number of pages5
JournalCatalysis Today
Volume79-80
DOIs
StatePublished - Apr 30 2003
EventCatalysis in Multiphase Reactors - Naples, Italy
Duration: May 29 2000May 29 2000

Keywords

  • Rhodium-tin catalysts
  • Selective hydrogenation of unsaturated alcohols
  • Surface organometallic chemistry on metals

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)

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