Silica-supported rhodium hydrides stabilized by triisopropylphosphine

被引：13
|
作者：
Scott, SL [1 ]
Mills, A
Chao, C
Basset, JM
Millot, N
Santini, CC
机构：
[1] Univ Ottawa, Dept Chem, Ctr Catalysis Res & Innovat, Ottawa, ON K1N 6N5, Canada
[2] Univ Calif Santa Barbara, Dept Chem Engn, Santa Barbara, CA 93106 USA
[3] CPE Lyon, CNRS, UMR 9986, Lab Chim Organomet Surface, F-69616 Villeurbanne, France
来源：
JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL | 2003年 / 204卷
关键词：
silica; surface organometallic chemistry; olefin hydrogenation; catalysis;
D O I：
10.1016/S1381-1169(03)00327-3
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The reaction of the silica-supported complex (dropSiO)(dropSiOX)Rh(eta(3)-C3H5)(2), where X is H or Si, with excess (PPr3)-Pr-i leads to the formation of the chemisorbed bis(phosphine) Rh(I) complex [dropSiORh((PPr3)-Pr-i)(2)](x), proposed to be dimeric (x = 2) on the basis of the P-31 MAS NMR spectrum. The phosphine complex irreversibly binds H-2 to give a hydride complex, dropSiORh((PPr3)-Pr-i)(2)(H)(2), characterized by IR and P-31 MAS NMR spectroscopy as well as D-exchange. The coordinatively unsaturated hydride complex is inferred to be the active site for hydrogenation of olefins under mild conditions. (C) 2003 Elsevier Science B.V. All rights reserved.
引用
收藏
页码：457 / 463
页数：7
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