Résumé A series of 2-(methyl-substituted-1H-benzoimidazol-2-yl)-6-(1-aryliminoethyl)pyridines (L1–L6) were synthesized and used as N^N^N tridentate ligands for their nickel complexes (C1–C12). All ligands were fully characterized by elemental, NMR and IR spectroscopic analyses, while their nickel complexes were characterized by elemental and IR spectroscopic analyses. The single-crystal X-ray diffraction reveals that the complexes C1, C3 and C9 have distorted octahedral geometry around the Ni center. All nickel complexes, activated with Et2AlCl, exhibit good catalytic activities toward ethylene oligomerization with major dimerization.
摘要 合成了一系列 2-(甲基取代-1H-
苯并咪唑-2-基)-6-(1-芳基亚
氨基乙基)
吡啶(L1-L6),并将其用作
镍配合物(C1-C12)的 N^N^N 三叉
配体。所有
配体都通过元素、核磁共振和红外光谱分析进行了表征,而它们的
镍配合物则通过元素和红外光谱分析进行了表征。单晶 X 射线衍射显示,C1、C3 和 C9 复合物在
镍中心周围具有扭曲的八面体几何形状。在 Et2AlCl 的活化作用下,所有
镍络合物都对
乙烯的低聚作用表现出良好的催化活性,并主要出现二聚化现象。