New ligands for Rh-catalysed hydroformylation of 1-octene in supercritical carbon dioxide -: X-ray structure of [Rh{PPh2(OC9H19)}4]PF6

被引：10
作者：
Giménez-Pedrós, M [1 ]
Aghmiz, A [1 ]
Ruiz, N [1 ]
Masdeu-Bultó, AM [1 ]
机构：
[1] Univ Rovira & Virgili, Dept Quim Fis & Inorgan, Fac Quim, Tarragona 43007, Spain
来源：
EUROPEAN JOURNAL OF INORGANIC CHEMISTRY | 2006年 / 5卷 / 05期
关键词：
alkenes; hydroformylation; P ligands; rhodium; supercritical fluids;
D O I：
10.1002/ejic.200500790
中图分类号：
O61 [无机化学];
学科分类号：
070301 ; 081704 ;
摘要：
The new P-donor ligands PPh3-n(OC9H19)(n) (n = 3, 2, 1) containing branched alkyl chains were synthesised and their coordination to Rh-I and Pd-II 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/H-2 at 5 atm and 80 degrees C in toluene led to the formation of [RhH(CO)-{PPh3-(OC9H19)(n)}(3)] as the main species. The Rh-catalysed hydroformylation of 1-octene with these ligands was investigated in supercritical carbon dioxide (scCO(2)) and toluene as solvents. Although the catalytic systems are not soluble in scCO(2), they are active. The activities are higher in toluene than in scCO(2) but the selectivities for aldehydes in the case of the phosphonite derivative are higher in the supercritical medium than in toluene. (c) Wiley-VCH Verlag GmbH & Co.
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收藏
页码：1067 / 1075
页数：9
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