Query:
faculty: "FNWI" and publication year: "2004"
| Authors | R.P.J. Bronger, J.P. Bermon, J.N.H. Reek, P.C.J. Kamer, P.W.N.M. van Leeuwen, D.N. Carter, P. Licence, M. Poliakoff | | Title | The immobilisation of phenoxaphosphine-modified xanthene-type ligand on polysiloxane support and application thereof in the hydroformylation reaction |
| Journal | Journal of Molecular Catalysis A-Chemical |
| Volume | 224 |
| Year | 2004 |
| Issue | 1-2 |
| Pages | 145-152 |
| ISSN | 13811169 |
| Faculty | Faculty of Science |
| Institute/dept. | FNWI: Van 't Hoff Institute for Molecular Sciences (HIMS) |
| Keywords | - |
| Abstract | For the first time a phenoxaphosphino-modified Xantphos-type ligand (1) has been covalently anchored to polysiloxane support (silica-1 and sol–gel-1). The use of these heterogenised ligands in the rhodium catalysed hydroformylation of 1-octene gives a system that is competitive with systems employing Xantphos (9) as ligand, but with the added advantages of immobilised systems, like facile catalyst recycling and facile product–catalyst separation. During the recycle experiments no rhodium leaching was detected by ICP analysis (<00.2% Rh-leaching of initial intake) when either silica-1 or sol–gel-1 were used.
The application of sol–gel-1 for the hydroformylation of trans-2-octene resulted in an active and regio-selective catalyst, but under forced reaction conditions (T = 393 K, p(CO/H2) = 3.6 bar) significant catalyst deterioration was detected.
The use of supercritical carbon dioxide as reaction medium in a continuous-flow set-up resulted in similar activities, but slightly lower regio-selectivities compared to batch-wise hydroformylation reactions in toluene. |
| Document type | Article |
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