Suo Hongyi, Zhao Tong, Wang Yiqing, Ban Qing, Sun Wen-Hua
Key Laboratory of Engineering Plastics and Beijing National Laboratory for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China.
CAS Research/Education Center for Excellence in Molecular Sciences, University of Chinese Academy of Sciences, Beijing 100049, China.
Molecules. 2017 Apr 13;22(4):630. doi: 10.3390/molecules22040630.
A series of -(2,2-dimethyl-1-(quinolin-2-yl)propylidene) arylamines was sophisticatedly synthesized and reacted with nickel(II) bromine for the formation of the corresponding nickel complexes. All the organic compounds were characterized by IR, NMR spectra and elemental analysis, while all the nickel complexes were characterized by IR spectra and elemental analysis. On activation with ethylaluminium sesquichloride (EASC) and modified methylaluminoxane (MMAO), all nickel precatalysts exhibited good activities toward ethylene oligomerization, indicating the positive efficiency of gem-dimethyl substitutents; in which major hexenes were obtained with MMAO. The catalytic parameters were verified, and the steric and electronic influences of substituents with ligands were observed, with a slight change of activities under different ethylene pressures.
一系列 -(2,2-二甲基-1-(喹啉-2-基)亚丙基)芳胺被精细合成，并与溴化镍(II)反应以形成相应的镍配合物。所有有机化合物通过红外光谱、核磁共振光谱和元素分析进行表征，而所有镍配合物通过红外光谱和元素分析进行表征。在用倍半氯化乙基铝(EASC)和改性甲基铝氧烷(MMAO)活化后，所有镍预催化剂对乙烯齐聚均表现出良好的活性，表明偕二甲基取代基具有积极效果；其中使用MMAO时主要得到己烯。对催化参数进行了验证，并观察了配体取代基的空间和电子影响，在不同乙烯压力下活性略有变化。
