Rhodium(I) complexes with 1′-(diphenylphosphino)ferrocenecarboxylic acid as active and recyclable catalysts for 1-hexene hydroformylation |
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| Authors: | Anna M. Trzeciak,Petr &Scaron těpni?ka,Ewa Mieczyńska |
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| Affiliation: | a Faculty of Chemistry, University of Wroc?aw, 14 F. Joliot-Curie Street, 50 383 Wroclaw, Poland
b Department of Inorganic Chemistry, Faculty of Science, Charles University, Hlavova 2030, 128 40 Prague, Czech Republic |
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| Abstract: | The rhodium complex trans-[Rh(CO)(Hdpf-κP)(dpf-κ2O,P)] (1), (Hdpf = 1′-(diphenylphosphino)ferrocenecarboxylic acid) was used as an efficient and recyclable catalyst for 1-hexene hydroformylation producing ca. 80% of aldehydes at 10 atm CO/H2 and 80 °C. After the reaction, unchanged complex 1 was separated from the reaction mixture and used again three times with the same catalytic activity. The effect of modifying ligands, phosphines and phosphites, on the reactivity of 1 was investigated. The active catalytic systems containing 1 or trans-[Rh(CO)(L)(dpf-κ2O,P)] (2) were formed in situ from acetylacetonato rhodium(I) precursors [Rh(CO)2(acac)] (3) or [RhL(CO)(acac)] (4) and Hdpf or Medpf (L = phosphine, Medpf = methyl ester of Hdpf). |
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| Keywords: | Rhodium Hydroformylation Ferrocenyl ligands Recyclable catalyst |
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