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Endowing Aspecific, Unbridged‐Metallocene Propylene‐Polymerization Catalysts with Isospecificity: The Unprecedented Role of MAO
Author(s) -
Kim Seong Kyun,
Kim Hwa Kyu,
Lee Min Hyung,
Yoon Seung Woong,
Do Youngkyu
Publication year - 2006
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.200600666
Subject(s) - tacticity , metallocene , polypropylene , polymerization , catalysis , polymer science , polymer chemistry , materials science , solid state , chemistry , organic chemistry , polymer
Unbridged yet isospecific metallocene polypropylene catalytic systems can be generated in situ during the MAO‐assisted activation step (see picture; MAO=methyl aluminum oxane), as demonstrated with a dimethylaminophenyl‐substituted zirconocene that has a racemic, C 2 ‐symmetric structure in the solid state and produces highly isotactic polypropylene.