Coordination Copolymerization of Severely Encumbered Isoalkenes with Ethylene: Enhanced Enchainment Mediated by Binuclear Catalysts and Cocatalysts
作者:Hongbo Li、Liting Li、David J. Schwartz、Matthew V. Metz、Tobin J. Marks、Louise Liable-Sands、Arnold L. Rheingold
DOI:10.1021/ja052995x
日期:2005.10.1
binuclear organotitanium "constrained geometry catalysts" (CGCs), (mu-CH(2)CH(2)-3,3')(eta(5)-indenyl)[1-Me(2)Si((t)()BuN)](TiMe(2))}(2)[EBICGC(TiMe(2))(2); Ti(2)] and (mu-CH(2)-3,3')(eta(5)-indenyl)[1-Me(2)Si((t)BuN)](TiMe(2))}(2)[MBICGC(TiMe(2))(2); C1-Ti(2)], in combination with the bifunctional bisborane activator 1,4-(C(6)F(5))(2)BC(6)F(4)B(C(6)F(5))(2) (BN(2)) in ethylene + olefin copolymerization processes
该贡献描述了双核有机钛“受限几何催化剂”(CGC)的实施,(mu-CH(2)CH(2)-3,3')(eta(5)-茚基)[1-Me(2 )Si((t)()BuN)](Time(2))}(2)[EBICGC(Time(2))(2); Ti(2)] 和 (mu-CH(2)-3,3')(eta(5)-茚基)[1-Me(2)Si((t)BuN)](TiMe(2))} (2)[MBICGC(时间(2))(2); C1-Ti(2)],结合双功能双硼烷活化剂 1,4-(C(6)F(5))(2)BC(6)F(4)B(C(6)F(5) )(2) (BN(2)) 在乙烯 + 烯烃共聚过程中。具体检查的是经典响应较差的 1,1-二取代共聚单体、亚甲基环戊烷 (C)、亚甲基环己烷 (D)、1,1,2-三取代 2-甲基-2-丁烯 (E) 和异丁烯 (F)。对于前三种共聚单体,这是通过配位聚合过程将它们结合到聚乙烯主链中的第一份报告。C