A Sterically Expanded “Constrained Geometry Catalyst” for Highly Active Olefin Polymerization and Copolymerization: An Unyielding Comonomer Effect
作者:Levi J. Irwin、Joseph H. Reibenspies、Stephen A. Miller
DOI:10.1021/ja044678g
日期:2004.12.1
The 14 A octamethyloctahydrodibenzofluorene moiety has been incorporated into a sterically expanded constrained geometry catalyst, Me2Si(eta1-C29H36)(eta1-N-tBu)ZrCl2.OEt2 (1). The solid-state structure suggests that the activated olefin polymerization catalyst is quite spatially accessible, rationalizing its extraordinary reactivity toward alpha-olefins. 1/MAO (MAO = methylaluminoxane) can be more
14 A 八甲基八氢二苯并芴部分已被纳入空间膨胀受限几何催化剂 Me2Si(eta1-C29H36)(eta1-N-tBu)ZrCl2.OEt2 (1)。固态结构表明活化的烯烃聚合催化剂在空间上非常容易接近,使其对α-烯烃的非凡反应性合理化。1/MAO(MAO = 甲基铝氧烷)对 α-烯烃的反应性比对乙烯的反应性更强,并且在与乙烯的共聚反应中表现出与 4-甲基-1-戊烯或 1-辛烯浓度成线性和连续比例的活性。