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Full Paper
New Ligands for Rh-Catalysed Hydroformylation of 1-Octene in Supercritical Carbon Dioxide – X-ray Structure of [Rh{PPh2(OC9H19)}4]PF6
Article first published online: 3 JAN 2006
DOI: 10.1002/ejic.200500790
Copyright © 2006 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
Additional Information
How to Cite
Giménez-Pedrós, M., Aghmiz, A., Ruiz, N. and Masdeu-Bultó, A. M. (2006), New Ligands for Rh-Catalysed Hydroformylation of 1-Octene in Supercritical Carbon Dioxide – X-ray Structure of [Rh{PPh2(OC9H19)}4]PF6. European Journal of Inorganic Chemistry, 2006: 1067–1075. doi: 10.1002/ejic.200500790
Publication History
- Issue published online: 21 FEB 2006
- Article first published online: 3 JAN 2006
- Manuscript Received: 7 SEP 2005
Keywords:
- Alkenes;
- Hydroformylation;
- P ligands;
- Rhodium;
- Supercritical fluids
Graphical Abstract
Abstract
The new P-donor ligands PPh3–n(OC9H19)n (n = 3, 2, 1) containing branched alkyl chains were synthesised and their coordination to RhI and PdII studied. The X-ray structure of [Rh{PPh2(OC9H19)}4]PF6 was determined. Reaction of the [Rh(acac)(CO)2]/PPh3–n(OC9H19)n systems with CO/H2 at 5 atm and 80 °C in toluene led to the formation of [RhH(CO){PPh3–n(OC9H19)n}3] as the main species. The Rh-catalysed hydroformylation of 1-octene with these ligands was investigated in supercritical carbon dioxide (scCO2) and toluene as solvents. Although the catalytic systems are not soluble in scCO2, they are active. The activities are higher in toluene than in scCO2 but the selectivities for aldehydes in the case of the phosphonite derivative are higher in the supercritical medium than in toluene. (© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2006)