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题名: Pyridine-Based N-Heterocyclic Carbene Hydride Complexes of Iridium via C-H Activation
作者: Song, Guoyong1;  Zhang, Yao1;  Su, Yan2;  Deng, Weiqiao1;  Han, Keli2;  Li, Xingwei1
通讯作者: Xingwei Li
刊名: ORGANOMETALLICS
发表日期: 2008-12-08
DOI: 10.1021/om800756c
卷: 27, 期:23, 页:6193-6201
收录类别: SCI ;  IC ;  CCR
文章类型: Article
部门归属: 11
项目归属: 1101
产权排名: 2;3
WOS标题词: Science & Technology ;  Physical Sciences
类目[WOS]: Chemistry, Inorganic & Nuclear ;  Chemistry, Organic
研究领域[WOS]: Chemistry
英文摘要: A series of iridium(III) hydride complexes of chelating pyridine-based N-heterocyclic carbenes (py-NHCs) and remote N-heterocyclic carbenes (remote py-NHCs) were synthesized as stable products from the C-H oxidative addition reactions of pyridine-tethered pyridinium halides and [Ir(COD)(2)](+). X-ray crystal structures of representative iridium py-NHC and remote py-NHC complexes were determined and in all cases mutual cis orientations of the halide and hydride ligands were observed in the solid state. In the solution phase, the cis isomer was observed as the only product for each iridium(III) py-NHC complex, whereas both cis and trans isomers have been observed as equilibration mixtures for iridium(III) remote py-NHC complexes. No beta-insertion of the hydride into a C=C bond of the COD unit of iridium(III) py-NHC hydride complexes was observed, and theoretical studies indicate that this step is thermodynamically unfavorable. Iridium(III) py-NHC hydride complexes have shown high catalytic activity in transfer hydrogenation of ketone and enones. Computational studies of the donor capacity of those ligands indicate that py-NHCs are more donating than imidazole-derived NHCs.
关键词[WOS]: TRANSFER HYDROGENATION ;  ALPHA,BETA-UNSATURATED ESTERS ;  COORDINATION CHEMISTRY ;  LIGAND ;  PALLADIUM(II) ;  RHODIUM ;  IRH5(PPH3)(2) ;  HETEROATOM ;  CATALYSIS ;  3-PYRIDYL
语种: 英语
原文出处: 查看原文
WOS记录号: WOS:000261142000019
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/101469
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Nanyang Technol Univ, Div Chem & Biol Chem, Sch Math & Phys Sci, Singapore 637371, Singapore
2.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Mol React Dynam, Dalian 116023, Peoples R China

Recommended Citation:
Song, Guoyong,Zhang, Yao,Su, Yan,et al. Pyridine-Based N-Heterocyclic Carbene Hydride Complexes of Iridium via C-H Activation[J]. ORGANOMETALLICS,2008,27(23):6193-6201.
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