Reaction of Phenyl Iso(thio)cyanate with N-Heterocyclic Carbene-Supported Nickel Complexes: Formation of Nickelacycles

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• 作者：Stefan Pelties ; Robert Wolf
• 刊名：Organometallics
• 出版年：2016
• 出版时间：August 22, 2016
• 年：2016
• 卷：35
• 期：16
• 页码：2722-2727
• 全文大小：407K
• 年卷期：0
• ISSN：1520-6041

文摘

The nickel(I) complex [(ηp>5p>-Cp)Ni(IPr)] (Cp = cyclopentadienyl, IPr = 1,3-bis(2,6-diisopropylphenyl)imidazolin- 2-ylidene) reacts with phenyl isothiocyanate to afford the new heteronickelacycle [(IPr)NiSC(NPh)N(Ph)CS] (1), which contains the novel bidentate and dianionic ligand {SC(NPh)N(Ph)CS}p>2–p>. Complex 1 is also obtained from the nickel(0) compound [(IPr)Ni(styrene)₂] with two equivalents of PhNCS. The γ-lactam-nickelacycle [(IPr)NiN(Ph)C(O)CH₂CH(Ph) (3) is formed from [(IPr)Ni(styrene)₂] and one equivalent of phenyl isocyanate. Complex 3 is a rare example of a nickel(II) complex with a T-shaped structure. Compounds 1 and 3 were characterized by X-ray crystallography, p>1p>H and p>13p>C NMR spectroscopy, UV–vis spectroscopy, and elemental analysis.