Song Zou, Zheng Wang, Yizhou Wang, Yanping Ma, Yang Sun, Wen-Hua Sun
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引用次数: 0
摘要
本研究通过镍模板一锅缩合法合成了 2-t-丁基-4-芳基亚氨基-2,3-二氢吖啶基镍二溴化物,并对其中一个代表性络合物进行了单晶 X 射线衍射表征,发现镍周围存在扭曲的四面体几何形状。当用改性甲基铝氧烷(MMAO)激活时,所有镍络合物都表现出很高的活性(高达 1.91 × 106 g mol-1 (Ni) h-1),可实现乙烯的主要三聚化。然而,当用二氯化铝(EtAlCl2)激活时,标题络合物在乙烯的选择性二聚化方面表现出良好的活性(高达 1.05 × 106 g mol-1 (Ni) h-1)。与类似的镍络合物相比,以叔丁基为取代基的镍络合物具有更高的活性,尤其是在镍络合物对乙烯进行三聚的罕见情况下。
On-Purpose Oligomerization by 2-t-Butyl-4-arylimino-2,3-dihydroacridylnickel(II) Bromides
In this study, 2-t-butyl-4-arylimino-2,3-dihydroacridylnickel dibromides were synthesized by nickel-template one-pot condensation, and well characterized along with the single-crystal X-ray diffraction to one representative complex, revealing a distorted tetrahedral geometry around nickel. When activated with modified methylaluminoxane (MMAO), all nickel complexes exhibited high activities (up to 1.91 × 106 g mol−1 (Ni) h−1) toward major trimerization of ethylene. When activated with ethylaluminum dichloride (EtAlCl2), however, the title complexes performed good activities (up to 1.05 × 106 g mol−1 (Ni) h−1) for selective dimerization of ethylene. In comparison to analogous nickel complexes, higher activities were achieved with the substituent of t-butyl group, especially in the rare case of nickel complexes performing trimerization of ethylene.
期刊介绍:
Catalysts (ISSN 2073-4344) is an international open access journal of catalysts and catalyzed reactions. Catalysts publishes reviews, regular research papers (articles) and short communications. Our aim is to encourage scientists to publish their experimental and theoretical results in as much detail as possible. Therefore, there is no restriction on the length of the papers. The full experimental details must be provided so that the results can be reproduced.