Synthesis of Ethylene-Bridged Bis(indenyl) Zirconium, Hafnium Complexes and Their Catalytic Behavior on Selective Propylene Oligomerization: the Effect of 3-Substituent on Indenyl Ring

Abstract

摘要 设计并合成了 12 个亚乙基桥联双茚类锆、 铪配合物 meso-/rac-1～7 [ansa-C2H4-(3-R-4,7-Me2-C9H3)2MCl2: M＝Zr, R＝ n Bu (meso-/rac-1), i Pr (meso-2), CH2Cy (meso-/rac-3), Bn (meso-/rac-4), CH2C6H4(4-CH3) (meso-/rac-5); M＝Hf, R＝二聚物的分布受温度及 Al/Zr 比的影响不大. 铪配合物 rac-7 表现出较高的 β-Me 消除选择性, 最高可 达 60.1%.