A series of Ni(II) complexes with the general formula [2-((NEt₂)Me)-8-{N(Ar)}C₉H₈N]NiCl₂, where Ar = 2,6-Me₂C₆H₃ in Ni1, 2,6-Et₂C₆H₃ in Ni2, 2,6-i-Pr₂C₆H₃ in Ni3, 2,4,6-Me₃C₆H₂ in Ni4, 2,6-Et₂-4-MeC₆H₂ in Ni5, and 2,4,6-t-Bu₃C₆H₂ in Ni6, has been prepared using a one-pot reaction of 2-(N,N-diethylaminomethyl)-6,7-dihydroquinolin-8(5H)-one with the corresponding aniline and nickel dichloride hexahydrate. The resultant complexes were characterized using elemental analysis and FT-IR spectroscopy, while the mononuclear Ni1 and Ni3 were also the subject of single-crystal X-ray diffraction study. On activation with MMAO, the complexes Ni1–Ni6 displayed good activity in ethylene oligomerization, forming hexenes (ca. 48% 1-hexene) as the major products and exhibiting thermal stability up to 50 °C under 10 atm C₂H₄. When MAO was applied as the cocatalyst, lower activity was observed, but the catalyst showed higher selectivity toward ethylene dimerization. It is also worth noticing that an induction period was observed as the Ni/MAO catalysts reached their peak activity after 30 min.

中文翻译：

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2-（N，N-二乙氨基甲基）-6,7-三氢喹啉基-8-亚胺基-Ni（II）氯化物：在乙烯二聚和三聚中的应用

一系列具有通式[2-（（NEt ₂）Me）-8- {N（Ar）} C ₉ H ₈ N] NiCl ₂的Ni（II）配合物，其中Ar = 2,6-Me ₂ C ₆ ħ ₃在NI1，2,6-的Et ₂ ç ₆ ħ ₃在NI2，2,6--I-PR ₂ ç ₆ ħ ₃中的Ni3，2,4,6--ME ₃ c ^ ₆ ħ ₂在NI4，2 ，6-ET ₂ -4-MEC ₆ ħ ₂在NI5和2,4,6-吨-Bu ₃ c ^ ₆ ħ ₂在NI6，一直采用的2-一釜反应制备（Ñ，Ñ -diethylaminomethyl）-6,7-二氢喹啉8（5 ħ） -一个与相应的苯胺和六水合二氯化镍。使用元素分析和FT-IR光谱对所得复合物进行表征，而单核Ni1和Ni3也是单晶X射线衍射研究的主题。在用MMAO活化后，配合物Ni1-Ni6在乙烯低聚反应中显示出良好的活性，形成己烯（ca.主要产品为48％1-己烯），在10 atm C ₂ H ₄下，在50°C时表现出热稳定性。当将MAO用作助催化剂时，观察到较低的活性，但是该催化剂对乙烯二聚反应显示出较高的选择性。还值得注意的是，在Ni / MAO催化剂在30分钟后达到其峰值活性时，观察到诱导期。