title: Zirconium-allyl complexes as resting states in zirconocene-catalyzed α-olefin polymerization.
abstract: UV-vis spectroscopic data indicate that zirconocene cations with Zr-bound allylic chain ends are generally formed during olefin polymerization with zirconocene catalysts. The rates and extent of their formation and of their re-conversion to the initial pre-catalyst cations depend on the types of zirconocene complexes and activators used.
authors.affiliation: Boreskov Institute of Catalysis, Russian Academy of Sciences, Pr. Lavrent'eva 5, and Novosibirsk State University, Ul. Pirogova 2, RU-630090, Novosibirsk, Russia.
authors.forename: Valentina N
authors.initials: VN
authors.lastname: Panchenko
authors.forename: Dmitrii E
authors.initials: DE
authors.lastname: Babushkin
authors.forename: Hans H
authors.initials: HH
authors.lastname: Brintzinger
mesh_terms: D000475:Alkenes / Q000737:chemistry*; D002384:Catalysis; D009942:Organometallic Compounds / Q000737:chemistry*; D058105:Polymerization; D011108:Polymers / Q000138:chemical synthesis / Q000737:chemistry; D013050:Spectrometry, Fluorescence; D015040:Zirconium / Q000737:chemistry*
chemical_list: D000475:Alkenes; D009942:Organometallic Compounds; D011108:Polymers; C023398:Zirconocene dichloride; C013658:propylene; C117224:1-hexene; D015040:Zirconium
keywords: allyl complexes; catalysis; metallocene catalysts; olefin polymerization; resting states