Department of Chemistry and Biochemistry, University of Windsor, Windsor, ON, Canada.
Chem Commun (Camb). 2011 Aug 28;47(32):9233-5. doi: 10.1039/c1cc12657a. Epub 2011 Jul 15.
An asymmetric nickel-nickel bonded intermediate was isolated in the reaction of biphenylene with bis(1,5-cyclooctadiene)nickel and i-Pr(3)P, where three of the four carbons are σ-bonded to one nickel. Mechanistic investigations support reactivity as a formal Ni(III)-Ni(I) complex; reductive elimination of cis-disposed Ni-C bonds from a single nickel centre directly provides a dinuclear Ni(I)-Ni(I) complex, a reaction relevant to dinuclear catalysis.
在联苯与双(1,5-环辛二烯)镍和异丙基三膦的反应中，分离出了一个不对称的镍-镍键合中间体，其中四个碳原子中的三个与一个镍原子形成σ键。机理研究表明其反应活性为一种形式上的 Ni(III)-Ni(I) 配合物；从单个镍中心直接消除顺式排布的 Ni-C 键，生成双核 Ni(I)-Ni(I) 配合物，这是一种与双核催化相关的反应。
