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Issue 36, 2010
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At the frontier between heterogeneous and homogeneous catalysis: hydrogenation of olefins and alkynes with soluble ironnanoparticles

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Abstract

The use of non-supported Fe nanoparticles in the hydrogenation of unsaturated C–C bonds is a green catalytic concept at the frontier between homogeneous and heterogeneous catalysis. Iron nanoparticles can be obtained by reducing Fe salts with strong reductants in various solvents. FeCl3 reduced by 3 equivalents of EtMgCl forms an active catalyst for the hydrogenation of a range of olefins and alkynes. Olefin hydrogenation is relatively fast at 5 bar using 5 mol% of catalyst. The catalyst is also active for terminal olefins and 1,1′ and 1,2-cis disubstituted olefins while trans-olefins react much slower. 1-Octyne is hydrogenated to mixtures of 1-octene and octane. Kinetic studies led us to propose a mechanism for this latter transformation where octane is obtained by two different pathways. Characterization of the nanoparticles via TEM, magnetic measurements and poisoning experiments were undertaken to understand the true nature of our catalyst.

Graphical abstract: At the frontier between heterogeneous and homogeneous catalysis: hydrogenation of olefins and alkynes with soluble iron nanoparticles

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Publication details

The article was received on 19 Mar 2010, accepted on 30 Jul 2010 and first published on 13 Aug 2010


Article type: Paper
DOI: 10.1039/C0DT00177E
Dalton Trans., 2010,39, 8464-8471

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    At the frontier between heterogeneous and homogeneous catalysis: hydrogenation of olefins and alkynes with soluble iron nanoparticles

    C. Rangheard, C. de Julián Fernández, P. Phua, J. Hoorn, L. Lefort and J. G. de Vries, Dalton Trans., 2010, 39, 8464
    DOI: 10.1039/C0DT00177E

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