Reversible C-H bond activation reactions of the N-heterocyclic carbene ligands in Ru(Ph2PCH2CH2CH2PPh2)(IMes)(CO)H2 and Ru(Ph2AsCH2CH2PPh2)(IMes)(CO)H2 (IMes=1,3-dimesityl-1,3-dihydro-2H-imidazol-2-ylidene)

被引：41

作者：

Chilvers, MJ ^{[1
]}

Jazzar, RFR ^{[1
]}

Mahon, MF ^{[1
]}

Whittlesey, MK ^{[1
]}

机构：

[1] Univ Bath, Dept Chem, Claverton Down, Bath BA2 7AY, Avon, England

来源：

ADVANCED SYNTHESIS & CATALYSIS | 2003年 / 345卷 / 9-10期

关键词：

As ligands; C-H activation; hydrides; metallacycles; N-heterocyclic carbenes; P ligands; ruthenium;

D O I：

10.1002/adsc.200303074

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

Thermolysis of Ru(IMes)(dppp)(CO)H-2 (1, IMes = 1,3-dimesityl-1,3-dihydro-2H-imidazol-2-ylidene; dppp = Ph2PCH2CH2CH2PPh2) in the presence of trimethylvinylsilane yields Ru(I-Mes')(dppp)(CO)H (2) resulting from intramolecular ArCH2 -H C-H bond activation of the N-heterocyclic carbene ligand. The structures of 1 and 2 have been established by X-ray crystallography. Treatment of Ru(IMes)(arphos)(CO)H2 (3, arphos=Ph2AsCH2CH2PPh2) with CH2=CHSiMe3 at 85degreesC produces a mixture of three C-H activated products 4a-c. The C-H activated complexes 2 and 4a-c reform their dihydride precursors upon heating under hydrogen.

引用

页码：1111 / 1114

页数：4

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