bidentate zwitterionic ligand L3H. Activation of the Fe(II) and Co(II) complexes with EtAlCl2 or MAO co-catalysts, gave active catalysts in oligomerization of ethylene to give C4 and C6 oligomers. Generally, the Co(II) complexes exhibited higher catalytic activities than their Fe(II) analogues. While activation with MAO produced mainly C4 oligomers (96%), EtAlCl2 gave predominantly C6 oligomers. Density functional
2-[((2-羟乙基)亚
氨基]甲基]
苯酚(L1H),2- [1-[([2-羟乙基)亚
氨基]乙基]
苯酚(
L2H)和2-[[((2-
二乙基氨基)乙基] [亚
氨基}甲基]
苯酚(L3H)与CoCl 2和FeCl 2盐生成
金属配合物[Co(L1)2 ](Co1),[Fe(L1)2 ](Fe1),[Co(
L2)2 ](Co2),[Fe(L)2 ](Fe2),[Co 2(L3H)2 Cl 4)] [ Co3)和[Fe 2(L3H)2 Cl 4 ](Fe3)。Fe1的分子结构证实了含有两个三齿结合的阴离子
配体L1的单核络合物的形成。另一方面,Co 3的固态结构确定了带有双齿两性离子
配体L 3 H的双核络合物的形成。Fe(II)和Co(II)配合物与EtAlCl 2或MAO助催化剂的活化,在
乙烯的低聚反应中得到活性催化剂,得到C 4和C 6低聚物。通常,Co(II)配合物比其Fe(II)类似物表现出更高的催化活性。尽管用MAO活化主要产生C