Perspectives of rhodium organometallic catalysis. Fundamental and applied aspects of hydroformylation

被引:109
作者
Trzeciak, AM [1 ]
Ziolkowski, JJ [1 ]
机构
[1] Univ Wroclaw, Fac Chem, PL-50383 Wroclaw, Poland
关键词
hydroformylation; phosphorus modifying ligands; rhodium catalysts; water soluble catalysts; bimetallic catalytic systems;
D O I
10.1016/S0010-8545(99)00127-7
中图分类号
O61 [无机化学];
学科分类号
070301 ; 081704 ;
摘要
Today's hydroformylation process almost exclusively use rhodium homogeneous catalysts. Some domination of octacarbonyl dicobalt as the catalyst precursor was followed with broad application of rhodium based organometallic catalysts modified with mainly phosphorus ligands. of different donor-acceptor properties and/or different cone/bite angles. Although there are many papers dealing with the comparative studies on structure-reactivity correlation, the effects of electronic and steric parameters of P-ligands on the catalytic activity of rhodium catalysts are not always predictable. Phosphines and phosphites as ligands, simple and structurally developed, bulky, mono and bidentate are still of great interest in the modification procedures of rhodium catalysts, especially when high regioselectivity in the hydroformylation is expected. Further development of the synthesis of phosphorus ligands led to the preparation of water soluble ligands and the creation of a new class of two-phase homogeneous catalysts, in this way solving problems of separation and/or catalysts reuse. Some new water soluble phosphines (PNS, PNa, PC) as well as N-pyrrolyl phosphines (PPhx(NC4H4)(3-x)) of required electronic parameters applied for synthesis of new rhodium catalyst precursors will be discussed and the results of structural studies will be used in the explanation of the observed catalytic activity in the model hydroformylation reaction of olefins (l-hexene, unsaturated alcohols) as well as related reactions, i.e. isomerization and hydrogenation. (C) 1999 Elsevier Science S.A. All rights reserved.
引用
收藏
页码:883 / 900
页数:18
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