An electronic rationale for observed initiation rates in ruthenium-mediated olefin metathesis: Charge donation in phosphine and N-heterocyclic carbene ligands

被引：51

作者：

Getty, Kendra ^{[1
]}

Delgado-Jaime, Mario Ulises ^{[1
]}

Kennepohl, Pierre ^{[1
]}

机构：

[1] Univ British Columbia, Dept Chem, Vancouver, BC V6T 1Z1, Canada

来源：

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY | 2007年 / 129卷 / 51期

关键词：

D O I：

10.1021/ja0747674

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Ru K-edge XAS data indicate that second generation ruthenium-based olefin metathesis precatalysts (L = N-heterocyclic carbene) possess a more electron-deficient metal center than in the corresponding first generation species (L = tricyclohexylphosphine). This surprising effect is also observed from DFT calculations and provides a simple rationale for the slow phosphine dissociation kinetics previously noted for second-generation metathesis precatalysts.

引用

页码：15774 / +

页数：4

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