thyl)pyridine derivatives (L1–L3) was prepared and used to synthesize the corresponding bis-ligated nickel(II) halide complexes (Ni1–Ni6) in good yield. The molecular structures of representative complexes, namely the bromide Ni3 and the chloride complex Ni6, were confirmed by single crystal X-ray diffraction, and revealed a distorted octahedral geometry at nickel. Upon activation with either methylaluminoxane
制备了一系列的2-(2-苯甲酰基
萘并甲基)
吡啶衍生物(L1-L3),并用于高产率地合成相应的双连接卤化
镍(II)配合物(Ni1-Ni6)。代表配合物,即
溴化物的分子结构的Ni3和
氯化物复合NI6,通过单晶X射线衍射确认,并且揭示在
镍一扭曲的八面体几何形状。在用甲基铝氧烷(MAO)或改性甲基铝氧烷(
MMAO)活化后,所有
镍络合物预催化剂均显示出高活性(高达2.02×10 7 g(PE)mol -1(Ni)h -1)进行
乙烯聚合,生产低分子量和窄分散性的支化聚
乙烯。研究了反应参数和
配体性质对标题
镍配合物催化行为的影响。