Abstract
We report the preparation of novel imidazoline-2-imine functionalized fluorenyl ligands with an ethylene bridge and their corresponding rare-earth metal complexes. Upon the activation of borate and triisobutyl aluminum (TIBA), all the rare-earth metal complexes could promote the syndiotactic polymerization of ortho-methoxystyrene (up to >99% rrrr), accompanying with the polar group activation effect via σ–π chelation of the methoxy and vinyl groups. The polymerization of 2-vinylprydiene was also performed.
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