Copolymerization of Ethylene and 1‐Hexene with Ansa‐Dimethylsilylene(fluorenyl) (t‐butylamido)Dimethyltitanium Complexes Activated by Modified Methylaluminoxane

ansa‐Dimethylsilylene(fluorenyl)(t‐butylamido)dimethyltitanium complex, Me2Si(η3‐C13H8)(η1‐NtBu)TiMe2(1), and its tetraalkylsubsutituted‐fluorenyl derivative, Me2Si(η3‐C29H36)(η1‐NtBu)TiMe2(2), are used as catalysts for ethylene/1‐hexene copolymerization activated by modified methylalminoxane. 2 is found to show remarkable activity and affords high‐molecular‐weight polymer compared with 1. The monomer reactivity ratios, rE and rH, are determined to be rE = 3.0 ± 0.15, rH = 0.19 ± 0.06 for 1, and rE = 2.9 ± 0.15, rH = 0.27 ± 0.02 for 2, indicating that 2 incorporates 1‐hexene slightly more than 1. image