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Stereospecific and Stereoselective Polymerization of 4‐Methyl‐1‐hexene by Enantiomeric Binaphthyl‐Bridged Salen Dichlorozirconium (IV) Complexes
Author(s) -
Strianese Maria,
Lamberti Marina,
Mazzeo Mina,
Pellecchia Claudio
Publication year - 2007
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.200700366
Subject(s) - stereoselectivity , polymerization , stereospecificity , 1 hexene , enantiomer , tacticity , polymer chemistry , hexene , chemistry , catalysis , enantiomeric excess , stereochemistry , enantioselective synthesis , organic chemistry , polymer , ethylene
Two enantiomers of a chiral binaphthyl‐bridged salen dichlorozirconium (IV) complex (namely R‐Λ‐ 1 and S‐Δ‐ 1 ) were synthesized and tested as pre‐catalysts for 4‐methyl‐1‐hexene (4MH) polymerization. Their behavior was compared with that of the same complex in its racemic form. Isotactic poly(4‐methyl‐1‐hexene) was produced in both cases, but the polymerization of racemic 4MH promoted by the optically active catalysts preferentially consumed one antipode, showing some stereoselectivity for the process.