Ruthenium Complexes Bearing Two N-Heterocyclic Carbene Ligands in Low Catalyst Loading Olefin Metathesis Reactions

被引：43

作者：

Bantreil, Xavier ^{[1
]}

Randall, Rebecca A. M. ^{[1
]}

Slawin, Alexandra M. Z. ^{[1
]}

Nolan, Steven P. ^{[1
]}

机构：

[1] Univ St Andrews, Sch Chem, EaStCHEM, St Andrews KY16 9ST, Fife, Scotland

来源：

ORGANOMETALLICS | 2010年 / 29卷 / 13期

关键词：

RING-CLOSING METATHESIS; INDENYLIDENE COMPLEXES; EFFICIENT; PHOSPHINE; POLYMERIZATION; BENZYLIDENE; KETONES; SCOPE;

D O I：

10.1021/om100310f

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

The synthesis of ruthenium indenylidene complexes containing mixed N-heterocyclic carbene ligands featuring one sterically small NHC [IMeMe (1,3,4,5-tetramethylimidazol-2-ylidene), (IPrMe)-Pr-i (1,3-diisopropyl-4,5-dimethylimidazol-2-ylidene), and ICy (1,3-dicyclohexylimidazol-2-ylidene)] and one larger congener SIMes (1,3-bis-(2,4,6 trimethylphenyl)imidazolin-2-ylidene) is described. Characterization by X-ray diffraction allowed for calculation of percent buried volume of the small NHCs in these complexes and for speculation on the relationship NHC/catalytic activity. In addition, these complexes displayed an enhanced stability but also a high ability to promote ring-closing metathesis reactions at catalyst loadings as low as 0.05 mol %.

引用

页码：3007 / 3011

页数：5

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