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Mechanism of syndiotactic‐specific polymerization of styrene
Author(s) -
Zambelli Adolfo,
Pellecchia Claudio,
Proto Antonio
Publication year - 1995
Publication title -
macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 1022-1360
DOI - 10.1002/masy.19950890135
Subject(s) - tacticity , styrene , polymerization , mechanism (biology) , polymer chemistry , materials science , chemistry , polymer science , copolymer , organic chemistry , polymer , philosophy , epistemology
Perusal of literature data and some new results concerning syndiotactic‐specific polymerization of styrene suggest a reaction mechanism accounting for the steric control. Key features of the proposed mechanism are stereorigid η n coordination of the growing chain end and diastereoselective coordination of the monomer imposed by direct interactions with the ancillary ligand of the metal complex, a pseudotetrahedral chiral Ti(III) or Zr(III) cation, which inverts its configuration after every syndiospecific insertion step.