We thank Sasol Technology (UK) Ltd. for financial support (S.L.D.), Sylvia Williamson, Dr. David Henderson, and Dr. Lorna Eades for ICP measurements, and Dr. Douglas Foster for helpful discussions.
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Communication
Carbon Dioxide Induced Phase Switching for Homogeneous-Catalyst Recycling†
Article first published online: 14 JAN 2009
DOI: 10.1002/anie.200804729
Copyright © 2009 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
Additional Information
How to Cite
Desset, Simon. L. and Cole-Hamilton, David J. (2009), Carbon Dioxide Induced Phase Switching for Homogeneous-Catalyst Recycling. Angew. Chem. Int. Ed., 48: 1472–1474. doi: 10.1002/anie.200804729
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Publication History
- Issue published online: 30 JAN 2009
- Article first published online: 14 JAN 2009
- Manuscript Revised: 30 OCT 2008
- Manuscript Received: 27 SEP 2008
Keywords:
- homogeneous catalysis;
- hydroformylation;
- phase switching;
- rhodium;
- sustainable chemistry
Abstract
SwitchPhos: Rhodium complexes formed from PPh3 ligands functionalized with weakly basic amidine groups are highly active catalysts for the hydroformylation of alkenes. On bubbling with CO2 in the presence of water, the yellow rhodium complexes move into the water phase, whereas bubbling with N2 at 60 °C causes them to switch back into the organic phase. The catalysts can be used for reactions in water or an organic phase.