Coordination de la phosphine organo-fer [CpFeIIC6Me5CH2PPh2]+ au RhI et proprietes spectroscopiques,electrochimiques et catalytiques des complexes heterobinucleaires FeII-RhI |
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Authors: | Roman E Enrique Castro W Veronica Camus O Margarita |
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Institution: | Pontificia Universidad Católica de Chile, Facultad de Química, Casilla 6177, Santiago, Chile, Canada |
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Abstract: | The reactions between the phosphine-organoiron CpFeII-η6-C6Me5CH2PPh2]+ PF6? (1) and RhCl(η4-diolefin)(μ-Cl)]2 in CH2Cl2 at reflux give the new heterobinuclear air-stable crystalline complexes CpFeII-η6-C6Me5CH2)P(Ph)2Rh(η4-diene)Cl]PF6,(D'*-diene=cyclooctadiene (COD): 65%, 2; trimethylfluorobenzobicyclo2.2.2]octadiene (Me3TFB): 48%, 3). Complexes 2 and 3 have been studied by 1H, 13C and 31P NMR spectroscopy and they are carbonylated (CO, 1 atm). Cyclic voltammetry experiments with addition of MeOH show electron transfer FeIRhI → FeIIRh0, the presence of a catalytic wave FeI/FeII and the possible formation of Rh hydrides. Under normal conditions 2 is a catalyst for hydrogenation of cyclohexene, but it is less efficient than the known mononuclear Rh1 analogues. |
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Keywords: | Address correspondence to this author |
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