Nickel(<scp>ii</scp>) complexes bearing 4,5-bis(arylimino)pyrenylidenes: synthesis, characterization, and ethylenepolymerization behaviour
作者:Kuifeng Song、Wenhong Yang、Baixiang Li、Qingbin Liu、Carl Redshaw、Yuesheng Li、Wen-Hua Sun
DOI:10.1039/c2dt32343e
日期:——
A series of nickel(II) dihalides complexes bearing 4,5-bis(arylimino)pyrenylidenes, NiX2(2,6-R1-4-R2C6H2N)2C16H8, was synthesized and characterized by FT-IR spectroscopy, elemental analysis, and single crystal X-ray diffraction for the organic compounds (L2 and L3) and the nickel complexes (C1 and C2). The molecular structures of C1 (R1 = Me, R2 = H, X = Br) and C2 (R1 = R2 = Me, X = Br) revealed a
合成并表征了一系列带有4,5-双(芳基)吡咯烷酮NiX 2(2,6-R 1 -4-R 2 C 6 H 2 N)2 C 16 H 8的镍(II)二卤化物配合物。通过FT-IR光谱,元素分析和有机化合物(L2和L3)和镍配合物(C1和C2)的单晶X射线衍射。的分子结构C1(R 1 =我,R 2 = H,X = Br)和C2(R 1 = R2 = Me,X = Br)在镍中心周围显示出扭曲的四面体几何形状。经助催化剂MAO,EASC和MMAO处理后,所有镍预催化剂均表现出很高的乙烯聚合活性(高达4.42×10 6 g(PE)mol(Ni) -1 h -1)。具有高支化度(每1000个碳最多可分支130个)和窄分子量分布的聚乙烯产品。研究了反应参数和配体性质对标题镍配合物催化行为的影响。