Counter-ligand and solvent dependent oxygen-metal interactions of hemilabile coordinating hydroxy groups in chiral diphosphine rhodium(I) hydrogenation catalysts

被引：19

作者：

Borns, S ^{[1
]}

Kadyrov, R ^{[1
]}

Heller, D ^{[1
]}

Baumann, W ^{[1
]}

Holz, J ^{[1
]}

Börner, A ^{[1
]}

机构：

[1] Univ Rostock EV, Inst Organ Katalyseforsch, D-18055 Rostock, Germany

来源：

TETRAHEDRON-ASYMMETRY | 1999年 / 10卷 / 08期

关键词：

D O I：

10.1016/S0957-4166(99)00128-7

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

In cationic Rh[(R,R)-1,4-bis(diphenylphosphino)butane-2,3-diol] complexes the interaction of the hemilabile coordinating hydroxy groups with the metal is strongly dependent upon the nature of the counter-ligand and the solvent. As a result of the 'arm-off, arm-on' mechanism the conformation of the chirality inducing backbone is changed. Spectroscopic and catalytic investigations demonstrate that the eta(3)-coordination mode of the tetradentate ligand is responsible for the deceleration of the asymmetric hydrogenation. By the assistance of the second HO-group the Rh-O interaction can be suspended. (C) 1999 Elsevier Science Ltd. All rights reserved.

引用

页码：1425 / 1431

页数：7

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