HIGH-PRESSURE NMR-STUDY OF IMINE HYDROGENATION CATALYZED BY RHODIUM(I) PHOSPHINE COMPLEXES - CHARACTERIZATION OF SPECIES PRESENT UNDER CATALYTIC CONDITIONS

被引：24

作者：

BALL, GE ^{[1
]}

CULLEN, WR ^{[1
]}

FRYZUK, MD ^{[1
]}

HENDERSON, WJ ^{[1
]}

JAMES, BR ^{[1
]}

MACFARLANE, KS ^{[1
]}

机构：

[1] UNIV BRITISH COLUMBIA,DEPT CHEM,VANCOUVER V6T 1Z1,BC,CANADA

来源：

INORGANIC CHEMISTRY | 1994年 / 33卷 / 07期

关键词：

D O I：

10.1021/ic00085a040

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

A high-pressure NMR cell based upon the use of a sapphire NMR tube and simple valve design was constructed. The use of the cell to study the hydrogenation of imines under 1000-2000 psi of hydrogen mediated by [tertiary bis(phosphine)]rhodium(I) catalysts is described. Complexes of the type [{Rh(diphos)}2(mu-H)(mu-X)] (X = Cl, I, OMe), which are formed at these elevated hydrogen pressures, were characterized in situ, and the possible significance of these complexes in the catalysis is discussed. The dihydride cis-[RhH2(diphos)2]Cl, produced in a side reaction, was spectroscopically characterized at low temperature under 1200 psi of H-2.

引用

页码：1464 / 1468

页数：5

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