Synthesis and characterization of titanium and zirconium complexes with silicone-bridged phenoxycyclopentadienyl ligands
作者:Hidenori Hanaoka、Takahiro Hino、Hiroshi Souda、Kazunori Yanagi、Yoshiaki Oda、Akio Imai
DOI:10.1016/j.jorganchem.2007.06.006
日期:2007.9
yield. This methodology could be applied to the preparation of related titanium and zirconoium complexes 1b–1d, 8 with silicone-bridged Cp-phenoxy ligands, whereas the reaction starting from methyl-protected precursor 2a did not produce the zirconium complex 8. Copolymerization of ethylene and 1-hexene with the newly prepared complexes was also investigated.
以烯丙基-为起始原料,高收率合成了二甲基二甲基硅烷基(2,3,4,5-四甲基环戊二烯基)(3-叔丁基-5-甲基-2-苯氧基)二氯化钛(1a)。保护的酚配体3a,首先用2当量处理。用n- BuLi制备选择性地得到3a的二锂盐和1-庚烯,1-庚烯是被保护的烯丙基醚部分和丁基阴离子的偶合产物。将TiCl 4添加到所得的3a在甲苯中的二锂盐中,得到1a,分离出的收率为50%。该方法可用于制备相关的钛和锆配合物1b – 1d,8具有硅桥连的Cp-苯氧基配体,而从甲基保护的前体2a开始的反应未生成锆配合物8。还研究了乙烯和1-己烯与新制备的配合物的共聚。