| http://www.w3.org/ns/prov#value | - A bis metallocene catalyst component in which a Group 4 transition metal is coordinated with a ligand comprising the structure: wherein at least R3 or R4 is a bulky substituent and R1 and R2 comprise alkyl, haloalkyl, or alkylsilyl substituents or connected to form a cycloaliphatic ring. 19.
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