Reversible, metal-free hydrogen activation

被引：1798

作者：

Welch, Gregory C. ^{[1
]}

Juan, Ronan R. San ^{[1
]}

Masuda, Jason D. ^{[1
]}

Stephan, Douglas W. ^{[1
]}

机构：

[1] Univ Windsor, Dept Chem & Biochem, Windsor, ON N9B 3P4, Canada

来源：

SCIENCE | 2006年 / 314卷 / 5802期

关键词：

D O I：

10.1126/science.1134230

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Although reversible covalent activation of molecular hydrogen (H-2) is a common reaction at transition metal centers, it has proven elusive in compounds of the lighter elements. We report that the compound (C6H2Me3)(2)PH(C6F4) BH(C6F5)(2) (Me, methyl), which we derived through an unusual reaction involving dimesitylphosphine substitution at a para carbon of tris( pentafluorophenyl) borane, cleanly loses H-2 at temperatures above 100 degrees C. Preliminary kinetic studies reveal this process to be first order. Remarkably, the dehydrogenated product (C6H2Me3)(2)P(C6F4)B(C6F5)(2) is stable and reacts with 1 atmosphere of H-2 at 25 degrees C to reform the starting complex. Deuteration studies were also carried out to probe the mechanism.

引用

页码：1124 / 1126

页数：3

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