Catalyst systems and methods for making and using the same. A catalyst system can include a non-metallocene catalyst having the structure: wherein M is a group 4 element, each of R
13
-R
20
are independently a hydrogen or a methyl group, wherein at least one of R
13
-R
20
is a methyl group, Ar is an aryl group or a substituted aryl group, Ar′ is an aryl group or a substituted aryl group, and each X is, independently, a hydride group, an amide, a benzyl group, a methyl group, a chloro group, a fluoro group, or a hydrocarbyl group.
催化剂系统及其制备和使用方法。
催化剂系统可以包括具有以下结构的非
金属茂咪啉
催化剂:其中M是第四族元素,R13-R20中的每一个都是
氢或
甲基基团,其中至少一个是
甲基基团,Ar是芳基或取代芳基,Ar'是芳基或取代芳基,每个X都是独立的,可以是
氢化物基团、
酰胺、
苄基、
甲基、
氯基、
氟基或烃基。