Irwin Levi J, Reibenspies Joseph H, Miller Stephen A
Department of Chemistry, Texas A&M University, College Station, TX 77843-3255, USA.
J Am Chem Soc. 2004 Dec 29;126(51):16716-7. doi: 10.1021/ja044678g.
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 reactive toward alpha-olefins than toward ethylene and exhibit activities that are linearly and continuously proportional to 4-methyl-1-pentene or 1-octene concentration in their copolymerizations with ethylene.
14 - A八甲基八氢二苯并芴部分已被引入到空间扩展的限定几何构型催化剂Me2Si(η1 - C29H36)(η1 - N - tBu)ZrCl2·OEt2 (1)中。固态结构表明，活化的烯烃聚合催化剂在空间上相当容易接近，这使其对α - 烯烃具有非凡的反应活性。1/MAO（MAO = 甲基铝氧烷）对α - 烯烃的反应活性可能比对乙烯的反应活性更高，并且在与乙烯的共聚反应中，其活性与4 - 甲基 - 1 - 戊烯或1 - 辛烯的浓度呈线性且连续的比例关系。
