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Polymerization of Norbornene Using Chiral Bis(phenolate) Zirconium Catalysts
Author(s) -
Tschage Marie,
Jung Seungwhan,
Spaniol Thomas P.,
Okuda Jun
Publication year - 2015
Publication title -
macromolecular rapid communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.348
H-Index - 154
eISSN - 1521-3927
pISSN - 1022-1336
DOI - 10.1002/marc.201400386
Subject(s) - norbornene , enantiopure drug , polymer chemistry , polymerization , zirconium , copolymer , tetramer , catalysis , materials science , ethylene , chemistry , organic chemistry , enantioselective synthesis , polymer , enzyme
Norbornene is polymerized by employing zirconium catalysts with (OSSO)‐type bis(phenolate) ligands. The racemic precatalyst rac ‐ 1 produces high molecular weight poly(norbornene) with slight optical activity. Enantiopure precatalysts ( S , S )‐ 1 and ( R , R )‐ 1 are used to study the optical induction in the poly(norbornene)s formed. To overcome the insolubility of poly(norbornene)s in common solvents, their microstructure is studied using copolymers with ethylene as well as hydrooligomers. The crystal structure of a norbornene tetramer is reported.