Half‐Titanocence Anilide Complexes Cp′TiCl
<sub>2</sub>
[N(2,6‐R
<sup>1</sup>
<sub>2</sub>
C
<sub>6</sub>
H
<sub>3</sub>
)R
<sup>2</sup>
]: Synthesis, Structures and Catalytic Properties for Ethylene Polymerization and Copolymerization with 1‐Hexene
作者:Kefeng Liu、Qiaolin Wu、Wei Gao、Ying Mu、Ling Ye
DOI:10.1002/ejic.201001299
日期:2011.4
structures of complexes 1, 4, and 5 were determined by single-crystal X-ray diffraction analysis. When activated with AliBu3 and Ph3CB(C6F5)4, complexes 1–5 exhibited reasonable catalytic activity in ethylene polymerization, producing high- or ultra-high-molecular-weight polyethylene. It was found that complex 4 shows the highest catalytic activity in ethylene polymerization and complexes 1–3 produced
[Cp'TiCl2N(2,6-R12C6H3)R2}] [R1 = iPr (1, 2, 4), Me (3, 5); R2 = Me (1, 3, 4, 5), Bn (2); Cp' = Cp (1, 2, 3), Cp* (4, 5)] 是通过 [Cp'TiCl3] 与相应苯胺的锂盐在甲苯或乙醚中反应合成的。所有钛配合物均通过 1H 和 13C NMR 光谱和元素分析进行表征。通过单晶 X 射线衍射分析确定了配合物 1、4 和 5 的分子结构。当用 AliBu3 和 Ph3CB(C6F5)4 活化时,配合物 1-5 在乙烯聚合中表现出合理的催化活性,生产高或超高分子量聚乙烯。发现配合物 4 在乙烯聚合中表现出最高的催化活性,配合物 1-3 产生超高分子量(Mη > 3 × 106 g mol-1,粘均分子量)聚乙烯。还研究了在 AliBu3/Ph3CB(C6F5)4 存在下由这些配合物催化的乙烯与