A series of bis-bidentate nickel(II) complexes [Ni(R-bimy-CH₂CONH)₂] (bimyH = benzimidazole; R = Me (3), Et (4), Ph (5)) bearing amido-functionalized N-heterocyclic carbene ligands, and pincer-type nickel(II) complexes [Ni(Py-bimy-CH₂CONH)X] (X = Cl (6), Br (7)) bearing an amido- and pyridyl-functionalized N-heterocyclic carbene ligand were prepared. These complexes were characterized by NMR (1D and 2D) and single-crystal X-ray diffraction. Complexes 3-5 possess cis configuration, and the carbene ligands bound to the nickel atom through C2 carbon and NH nitrogen in a bis-bidentate coordination mode. In complexes 6 and 7, the pyridyl substituent was also N-bound to the nickel metal center resulting in a pincer-type coordination mode. As observed from the proton NMR spectra, the six-membered chelate rings in complexes 3-5 rendered the protons of the methylene moieties diastereotopic, and the cis configuration made the free rotation of the ethyl substituent in 4 and the phenyl substituent in 5 hampered by the adjacent substituent. The catalytic activity of these nickel complexes in Kumada cross-coupling of phenylmagnesium bromide with aryl chlorides was also investigated. The results indicated that pincer-type complexes 6 and 7 displayed excellent to moderate catalytic activity depending on the aryl chloride used.

一系列具有氨基官能化的双齿双镍（II）配合物[Ni（R-bimy-CH ₂ CONH）₂ ]（bimyH =苯并咪唑； R = Me（3），Et（4），Ph（5）） N杂环卡宾配体和钳型镍（II）配合物[Ni（Py-bimy-CH ₂ CONH）X]（X = Cl（6），Br（7））带有酰胺基和吡啶基官能化的N制备了杂环卡宾配体。这些配合物通过NMR（1D和2D）和单晶X射线衍射进行表征。配合物3 - 5具备Ç是卡宾配体以双双配位方式通过C2碳和NH氮与镍原子键合。在配合物6和7中，吡啶基取代基也N键合至镍金属中心，从而导致钳型配位模式。如从质子NMR谱观察到的，六元螯合环在配合物3 - 5个呈现的亚甲基部分非对映异构的质子，而C是配置所作的乙基取代基的自由旋转在4和苯基取代基在5受到相邻取代基的阻碍。还研究了这些镍基络合物在苯基溴化镁与芳基氯的熊田交叉偶联中的催化活性。结果表明，取决于所用的芳基氯，钳型配合物6和7显示出优异至中等的催化活性。