supporting the proposed polymerization mechanism. For ethylene-styrene copolymerization, polar solvents are found to increase copolymerization activities and coproduce atactic polystyrene impurities in addition to ethylene-co-styrene, without diminishing the comonomer incorporation selectivity. Both homopolymerization and copolymerization results argue that substantial cooperative effects between catalytic
该贡献描述了由单中心双
金属“受限几何催化剂”(CGC)、(mu- -3,3')(eta(5)-
茚基)介导的
苯乙烯均聚和
乙烯和
苯乙烯共聚单体的共聚[1-Me2Si(tBuN)](Time2)}2 [EBICGC(TiMe2)2; Ti2], (mu- -3,3')(eta(5)-
茚基)[1-Me2Si(tBuN)](ZrMe2)}2 [EBICGC(ZrMe2)2; Zr2], (mu-
CH2-3,3')(eta(5)-indenyl)[1-Me2Si(tBuN)](TiMe2)}2 [MBICGC(TiMe2)2; C1-Ti2],和 (mu- -3,3')(eta(5)-
茚基)[1-Me2Si(tBuN)](ZrMe2)}2 [MBICGC(ZrMe2)2; C1-Zr2],与
硼酸盐活化剂/助催化剂 Ph3C+ B(
C6F5)4- (B1) 结合使用。在相同的
苯乙烯均聚条件下,C1-Ti2