A warning on the use of radical traps as a test for radical mechanisms:: They react with palladium hydrido complexes

被引：131

作者：

Albéniz, AC

Espinet, P ^{[1
]}

López-Fernández, R

Sen, A

机构：

[1] Univ Valladolid, Fac Ciencias, Dept Quim Inorgan, E-47005 Valladolid, Spain

[2] Penn State Univ, Dept Chem, University Pk, PA 16802 USA

来源：

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY | 2002年 / 124卷 / 38期

关键词：

D O I：

10.1021/ja0271126

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Typical radical traps (galvinoxyl, TEMPO, DPPH) react with palladium hydrides, sometimes at rates competitive with those of palladium hydride catalyzed reactions that follow an insertion mechanism (for example, alkene isomerization). Thus, positive results for radical reaction tests can be misleading. The complexes with more polarizable (neutral complexes rather than cationic) and more accessible hydrides, and the less sterically protected radical traps, react faster. Copyright © 2002 American Chemical Society.

引用

页码：11278 / 11279

页数：2

共 13 条

[11] PREPARATION AND REACTIONS OF TRIETHYLPHOSPHINE COMPLEXES OF ZEROVALENT NICKEL, PALLADIUM, AND PLATINUM [J].

SCHUNN, RA .

INORGANIC CHEMISTRY, 1976, 15 (01) :208-212

[12] Spontaneous multiple insertion of a bulky aromatic isocyanide into the palladium-hydride bond of trans-[Pd(H)Cl(PPh(3))(2)], leading to formation of heterobicyclic and pyrrole compounds [J].

Tanase, T ;

Ohizumi, T ;

Kobayashi, K ;

Yamamoto, Y .

ORGANOMETALLICS, 1996, 15 (15) :3404-3411

[13]

Tsuji J., 1995, PALLADIUM REAGENTS C

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