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学科主题: 金属有机化学
题名: Synthesis, Structure, and Reactivity of Organo-lron(II) Complexes with N-Heterocyclic Carbene Ligation
其他题名: 含单齿氮杂环卡宾配体的有机铁(II)络合物的合成、结构和反应性质研究
作者: Xiang L(向丽) ; Xiao J(肖洁) ; Deng L(邓亮)
通讯作者: 邓亮
刊名: Organometallics
发表日期: 2011
卷: 30, 期:7, 页:2018-2025
收录类别: SCI
部门归属: 中科院上海有机化学研究所
英文摘要: The synthesis, structure, and reactivity of some organo-iron complexes with monodentate N-heterocyclic carbene (NHC) ligation were studied. Mononuclear ferrous complexes [(IEt)(2)FeR(2)] (IEt = 2,5-diethyl-3,4-dimethylimidazol-1-ylidene, R = Me (2a), CH(2)TMS (2b)) and [(IPr)FeMes(2)] (3, IPr = 2,5-diisopropy1-3,4-dimethylimidazol-1-ylidene) were prepared in good yields via salt elimination reactions of [(NHC)(2)FeCl(2)] (1) with alkylation reagents. The interaction of 1 with PhLi gave a mixture of dinuclear complexes [Cl(IEt)Fe(IEt')(2)Fe(IEt)Cl] (4a) and [Ph(IEt)Fe(IEt')(2)Fe(IEt)Ph] (4b) (IEt' = 3-Et-4,5-Me(2)-2-ylideneimidazolyl anion), in which N-C(ethyl) bond cleavage of the NHC ligand was involved. Complexes 2a-4b were characterized by (1)H NMR, elemental analyses, and single-crystal X-ray diffraction studies. Solution magnetism measurement by Evan's method revealed the high-spin electronic configuration for the mononuclear organo-iron(L) complexes 2a, 2b, and 3. Reactivity studies showed the tetrahedral complex 2a was inert toward many unsaturated organic substrates, whereas the trigonal-planar complex 3 could react with CO and carbodiimide Pr(i)N=C=NPr(i) to yield dimesityl ketone and [(IPr)Fe(Mes)(eta(2)-Pr(i)NC(Mes)NPr(i))] (5), respectively. Relevant to iron-catalyzed Kumada couplings, both complexes 2b and 3 were found reactive with PhI to yield the corresponding carbon-carbon bond formation products Ph-CH(2)TMS and Ph-Mes.
语种: 英语
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WOS记录号: WOS:000289008700034
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内容类型: 期刊论文
URI标识: http://ir.sioc.ac.cn/handle/331003/27891
Appears in Collections:金属有机化学国家重点实验室_期刊论文

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Recommended Citation:
Xiang L,Xiao J,Deng L. Synthesis, Structure, and Reactivity of Organo-lron(II) Complexes with N-Heterocyclic Carbene Ligation[J]. Organometallics,2011,30(7):2018-2025.
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