title: At the frontier between heterogeneous and homogeneous catalysis: hydrogenation of olefins and alkynes with soluble iron nanoparticles.
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. FeCl(3) 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.
authors: DSM Innovative Synthesis B.V., a unit of DSM Pharma Chemicals, P. O. Box 18, 6160, MD Geleen, The Netherlands.
authors: Claudine
authors: C
authors: Rangheard
authors: César
authors: C
authors: de Julián Fernández
authors: Pim-Huat
authors: PH
authors: Phua
authors: Johan
authors: J
authors: Hoorn
authors: Laurent
authors: L
authors: Lefort
authors: Johannes G
authors: JG
authors: de Vries
mesh_terms: D000475:Alkenes / Q000737:chemistry*; D000480:Alkynes / Q000737:chemistry*; D002384:Catalysis; D006865:Hydrogenation; D007501:Iron / Q000737:chemistry*; D007700:Kinetics; D053768:Metal Nanoparticles / Q000737:chemistry*
chemical_list: D000475:Alkenes; D000480:Alkynes; D007501:Iron