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Summary: Stereoblock, isotactic‐hemiisotactic poly(propylene) is produced with C1‐symmetric Me2C(η5‐3‐(2‐adamantyl)‐C5H3)(η5‐C9H4S2)ZrCl2 (1). Ethylene/propylene copolymerization data with the Cs‐symmetric Me2C(η5‐C5H4)(η5‐C9H4S2)ZrCl2 (2) metallocene reveals that it is highly propylene‐specific and that it produces more random ethylene/propylene copolymers than its fluorenyl analog.
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Ewen et al. (2004) studied this question.
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