Synthesis, Characterization and Ethylene Oligomerization Behavior of Neutral Nickel Complexes Bearing N-Fluorinated Phenyl Salicylaldiminato Chelate Ligands  

作　　者：宋力平 宋绍迪 黄吉玲 

机构地区：[1]Laboratory of Organometallic Chemistry,East China University of Science and Technology,Shanghai 200237,China [2]Department of Chemistry,School of Science,Shanghai University,Shanghai 200444,China

出　　处：《Chinese Journal of Chemistry》2012年第5期1119-1126,共8页中国化学（英文版）

基　　金：Acknowledgement The authors gratefully acknowledge the financial support subsidized by the National Basic Research Program of China （No. 2005CB623800）, the National Natural Science Foundation of China （NNSFC） （No. 21072128）.

摘　　要：A series of neutral nickel complexes featuring N-fluorinated phenyl salicylaldiminato chelate ligands was syn- thesized, and the novel molecular structure of complex C14 was further confirmed by X-ray crystallographic analy- sis. The neutral nickel complexes showed high activity up to 9.96× 10^5 g oligomers/（mol Nioh） and high selectivity of C6 in catalyzing ethylene oligomerization using methylaluminoxane （MAO） as cocatalyst. It was observed that the strong electron-withdrawing effect of the fluorinated salicylaldiminato ligand was able to significantly increase the catalytic activity for oligomerization of ethylene. In addition, the influence of reaction parameters such as A1/Ni molar ratio, reaction temperature, a variety of cocatalyst and ethylene pressure on catalytic activity was investigated.A series of neutral nickel complexes featuring N-fluorinated phenyl salicylaldiminato chelate ligands was syn- thesized, and the novel molecular structure of complex C14 was further confirmed by X-ray crystallographic analy- sis. The neutral nickel complexes showed high activity up to 9.96× 10^5 g oligomers/（mol Nioh） and high selectivity of C6 in catalyzing ethylene oligomerization using methylaluminoxane （MAO） as cocatalyst. It was observed that the strong electron-withdrawing effect of the fluorinated salicylaldiminato ligand was able to significantly increase the catalytic activity for oligomerization of ethylene. In addition, the influence of reaction parameters such as A1/Ni molar ratio, reaction temperature, a variety of cocatalyst and ethylene pressure on catalytic activity was investigated.

关 键 词：neutral nickel complex N-fluorinated phenyl salicylaldiminato ligand crystal structure ethylene oligomerization 

分 类 号：O625.632[理学—有机化学] O632.12[理学—化学]