Three-Coordinate Iron(II) Dialkenyl Compound with NHC Ligation: Synthesis, Structure, and Reactivity

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• 作者：Yuesheng Liu ; Lei Wang ; Liang Deng
• 刊名：Organometallics
• 出版年：2015
• 出版时间：September 14, 2015
• 年：2015
• 卷：34
• 期：17
• 页码：4401-4407
• 全文大小：414K
• ISSN：1520-6041

文摘

The reaction of [(IPr₂Me₂)₂FePh₂] with PhC鈮Ph furnished a three-coordinate iron(II) dialkenyl complex, [(IPr₂Me₂)Fe(蟽-CPh鈺怌Ph₂)₂] (1, IPr₂Me₂ = 1,3-diisopropyl-4,5-dimethylimidazol-2-ylidene), that represents a rare example of isolable low-coordinate iron alkenyl complexes with a high-spin ground state. Complex 1 was characterized by ¹H NMR spectroscopy, solution magnetic susceptibility measurement, M枚ssbauer spectroscopy, single-crystal X-ray diffraction study, and elemental analyses. A reactivity study revealed the reactions of 1 with PhCH₂Cl to produce cross-coupling product Ph₂C鈺怌PhCH₂Ph (2), with [Cp₂Fe][BAr^F₄] to yield Ph₂C鈺怌Ph鈥揅Ph鈺怌Ph₂ (3), and with CO, 2,6-dimethylphenyl isocyanide, and phenyl azide to produce novel iron(0) and iron(II) complexes 4鈥?b>6 bearing triphenylvinyl-derived ligands. These transformations demonstrated the high reactivity of the low-coordinate iron alkenyl complex.