Synthesis and polymerization behavior of tetrahydro-2-methylbenzindenyltitanium and zirconium compounds
作者:Patrick Foster、Marvin D Rausch、James C.W Chien
DOI:10.1016/s0022-328x(98)00891-2
日期:1998.12
In order to further our study of the bis(2-methylbenz[e]indenyl)zirconium dichloride catalyst system, we have synthesized the analogous tetrahydro-2-methylbenz[e]indene ligand (4). In the process of synthesizing 4, we have found that the structural isomer tetrahydro-2-methylbenz[f]indene (5) is also formed. This has been confirmed by the synthesis of a series of dimethyl (6 and 7), methyl-phenyl (8)
为了进一步研究双(2-甲基苯并[ e ]茚基)二氯化锆催化剂体系,我们合成了类似的四氢-2-甲基苯并[ e ]茚基配体(4)。在合成4的过程中,我们发现还形成了结构异构体四氢-2-甲基苯并[ f ]茚(5)。这已通过母体中间体4和5的一系列二甲基(6和7),甲基苯基(8)和三氯化钛衍生物(11和12)的合成得到证实。新的配体系统4,6,7,和8被转换成类似的未桥连的二氯二茂锆络合物13,14,15,和16。然后将前体用甲基铝氧烷(MAO)或四(五氟苯基)硼酸三苯基碳鎓(三苯甲基)活化,并用作乙烯和丙烯聚合的催化剂。所有的锆茂复合物对乙烯的聚合均具有很高的活性,在某些情况下,在较低的聚合温度下会生成结晶聚丙烯。