Carbene-Based Lewis Pairs for Hydrogen Activation

被引：50

作者：

Runyon, Jason W. ^{[1
]}

Steinhof, Oliver ^{[1
]}

Dias, H. V. Rasika ^{[2
]}

Calabrese, Joseph C. ^{[2
]}

Marshall, William J. ^{[2
]}

Arduengo, Anthony J., III ^{[1
]}

机构：

[1] Univ Alabama, Dept Chem, Tuscaloosa, AL 35487 USA

[2] EI du Pont de Nemours & Co, Cent Res & Dev Dept, Expt Stn E500 1808, Wilmington, DE 19880 USA

来源：

AUSTRALIAN JOURNAL OF CHEMISTRY | 2011年 / 64卷 / 08期

基金：

美国国家科学基金会;

关键词：

RUTHENIUM; FACILE; DIHYDROGEN; COMPLEXES; METHANOL; ANION;

D O I：

10.1071/CH11246

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

A series of Lewis acid-base pairs containing sterically demanding carbenes were investigated for hydrogen activation that could potentially be reversible for use in hydrogen storage applications. When electron-rich boranes are employed as electrophiles, the imidazolium cation is reduced to a 2H-imidazoline (aminal). The aminals were synthesized independently by reduction of imidazolium cations with strong reducing agents. Carbocations were also found to act as electrophiles for hydrogen activation. Preliminary results revealed that it is possible to reduce an alcohol to an alkane using hydrogen gas as a reducing agent in these systems. Finally, it was demonstrated that a transition metal can be used as an electrophile to activate hydrogen through heterolytic cleavage.

引用

页码：1165 / 1172

页数：8

共 25 条

[1] An anion-dependent switch in selectivity results from a change of C-H activation mechanism in the reaction of an imidazolium salt with IrH5(PPh3)2 [J].