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Square-Planar Cobalt Complexes with Monodentate N-Heterocyclic Carbene Ligation: Synthesis, Structure, and Catalytic Application
其他题名含单齿氮杂环卡宾配体的平面正方型钴(I)络合物的合成、结构和催化应用研究
Mo ZB(莫贞波); Li YX(李玉学); Li HJ(李鸿基); Deng L(邓亮)
2011
发表期刊Organometallics
ISSN0276-7333
卷号30期号:17页码:4687-4694
摘要The unique cobalt(I)-NHC complex [CO(lEt)(4)] [BPh(4)] (1) (IEt = 1,3-diethyl-4,5-dimethylimidazole-2-ylidene) and its analogues employing other carbene ligands were prepared by the reactions of [Co(PPh(3))(3)Cl] with free carbene ligands followed by anion exchange. X-ray diffraction revealed 1 features a homoleptic cation [Co(IEt)(4)](+) with square-planar geometry. Electrochemical studies showed the square-planar complexes support the redox series [Co(IEt)(4)](+/2+3+), of which the divalent cation has been synthesized and structurally characterized as in [Co (IEt)(4)] [BF(4)](2) (2). Both EPR and DFT studies indicated 2 has a low-spin Co(II) center. 1 can efficiently catalyze the oxidative homocoupling reactions of aryl Grignard reagents. Investigations on the stoichiometric reactions of 1 with organic halides and 2 with aryl Grignard reagents established an interesting radical mechanism involving the [Co (IEt)(4)](+/2+) redox shuttle for these cobalt-NHC complex catalyzed homocoupling reactions.
学科领域金属有机化学
部门归属中科院上海有机化学研究所; 香港中文大学
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收录类别SCI
语种英语
WOS记录号WOS:000294647500030
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文献类型期刊论文
条目标识符http://ir.sioc.ac.cn/handle/331003/27901
专题金属有机化学国家重点实验室
通讯作者Deng L(邓亮)
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GB/T 7714
Mo ZB,Li YX,Li HJ,et al. Square-Planar Cobalt Complexes with Monodentate N-Heterocyclic Carbene Ligation: Synthesis, Structure, and Catalytic Application[J]. Organometallics,2011,30(17):4687-4694.
APA 莫贞波,李玉学,李鸿基,&邓亮.(2011).Square-Planar Cobalt Complexes with Monodentate N-Heterocyclic Carbene Ligation: Synthesis, Structure, and Catalytic Application.Organometallics,30(17),4687-4694.
MLA 莫贞波,et al."Square-Planar Cobalt Complexes with Monodentate N-Heterocyclic Carbene Ligation: Synthesis, Structure, and Catalytic Application".Organometallics 30.17(2011):4687-4694.
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