Synthesis, Characterization and Ethylene Oligomerization Behavior of Neutral Nickel Complexes Bearing N-Fluorinated Phenyl Salicylaldiminato Chelate Ligands
Liping Song
Laboratory of Organometallic Chemistry, East China University of Science and Technology, Shanghai 200237, China
Department of Chemistry, School of Science, Shanghai University, Shanghai 200444, China
Search for more papers by this authorShaodi Song
Laboratory of Organometallic Chemistry, East China University of Science and Technology, Shanghai 200237, China
Search for more papers by this authorCorresponding Author
Jiling Huang
Laboratory of Organometallic Chemistry, East China University of Science and Technology, Shanghai 200237, China
Laboratory of Organometallic Chemistry, East China University of Science and Technology, Shanghai 200237, China, Tel.: +86-21-54282375Search for more papers by this authorLiping Song
Laboratory of Organometallic Chemistry, East China University of Science and Technology, Shanghai 200237, China
Department of Chemistry, School of Science, Shanghai University, Shanghai 200444, China
Search for more papers by this authorShaodi Song
Laboratory of Organometallic Chemistry, East China University of Science and Technology, Shanghai 200237, China
Search for more papers by this authorCorresponding Author
Jiling Huang
Laboratory of Organometallic Chemistry, East China University of Science and Technology, Shanghai 200237, China
Laboratory of Organometallic Chemistry, East China University of Science and Technology, Shanghai 200237, China, Tel.: +86-21-54282375Search for more papers by this authorAbstract
A series of neutral nickel complexes featuring N-fluorinated phenyl salicylaldiminato chelate ligands was synthesized, and the novel molecular structure of complex C14 was further confirmed by X-ray crystallographic analysis. The neutral nickel complexes showed high activity up to 9.96×105 g oligomers/(mol Ni·h) 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 Al/Ni molar ratio, reaction temperature, a variety of cocatalyst and ethylene pressure on catalytic activity was investigated.
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