Bimetallic hydroformylation: A zwitterionic Rh-IRhI tetraphosphine ligand-based bimetallic complex exhibiting facile CO addition and phosphine ligand rearrangement equilibrium

被引:32
作者
Peng, WJ [1 ]
Train, SG [1 ]
Howell, DK [1 ]
Fronczek, FR [1 ]
Stanley, GG [1 ]
机构
[1] LOUISIANA STATE UNIV,DEPT CHEM,BATON ROUGE,LA 70803
关键词
D O I
10.1039/cc9960002607
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
The X-ray structure of an unsymmetrical tetraphosphine bridged zwitterionic (RhRhI)-Rh--I dinuclear tetracarbonyl complex is reported along with the facile CO addition equilibrium to form an Rh-0 tetraphosphine pentacarbonyl bimetallic species; both of these are poor hydroformylation catalysts due to the relatively high electron density on the rhodium centres, in marked contrast to a dicationic bimetallic Rh-II complex based on the same tetraphosphine ligand that is a highly active and regioselective hydroformylation catalyst.
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页码:2607 / 2608
页数:2
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