Synthesis of 3,3,3-Trifluoropropyl Substituted Cyclopentadienes and Their Zirconocene Derivatives: Catalytic Applications in the Polymerization of Ethylene
作者:Andreas Steffen、Timo Hagemeister、Thomas Braun、Peter Jutzi、Beate Neumann、Hans-Georg Stammler
DOI:10.1021/om700457c
日期:2007.10.1
synthesis and structure of novel 3,3,3-trifluoropropyl substituted cyclopentadienes (2/3) and of their zirconocene dichloride derivatives [Zr(η5-C5H4C2H4CF3)2Cl2] (6) and [Zrη5-C5H3-1,2-(C2H4CF3)2}2Cl2] (7) is reported. These precatalysts have been investigated toward their properties in the methylaluminoxane (MAO) assisted polymerization of ethylene. The results can be compared to the polymerization properties
新颖3,3,3-三氟丙基取代的环戊二烯(的合成和结构2 / 3)和它们的二氯二茂锆衍生物的[Zr的(η 5 -C 5 H ^ 4 c ^ 2 ^ h 4 CF 3)2氯2 ](6)和[Zr的η 5 -C 5 H ^ 3 -1,2-(C 2 H ^ 4 CF 3)2 } 2氯2 ](7)被报告。已针对这些预催化剂在甲基铝氧烷(MAO)辅助的乙烯聚合反应中的性能进行了研究。结果可以与非氟化类似物的聚合性质[Zr的(η 5 -C 5 H ^ 4 c ^ 2 ^ h 4 CH 3)2氯2 ](11)。配合物6和7可以生产高密度聚乙烯(HDPE),并且是供体官能化的非桥联茂金属中活性最高的预催化剂。对于使用6的聚合反应,观察到摩尔质量分布的前所未有的温度独立性。