Abstract
In the presence of dried methylaluminoxane as an activator, the hafnium(IV) dichloro pre-catalyst 4 incorporating with an [OSSO]-type ligand was found to promote precisely isospecific 1-hexene polymerizations of [mmmm] up to 95 % with fairly high activities (1,050–3,180 g mmol(4)−1 h−1) and relatively narrow polydispersities (M w/M n = 1.5–1.8).
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