title: Developments of chiral metallocenes as polymerization catalysts.
abstract: This review article describes developments in chiral metallocenes as polymerization catalysts focusing on C2 symmetric ansa-zirconocene complexes. Selective synthesis of rac-isomers of ansa-zirconocenes are surveyed. Isospecific polymerizations of propylene catalyzed by chiral zirconocenes are summarized. Advanced series of polymerizations by chiral metallocenes such as asymmetric polymerization and polymerization of polar monomers are also introduced.
authors.affiliation: Department of Applied Chemistry, Graduate School of Engineering, Hiroshima University, Higashi-Hiroshima 739-8527, Japan. yuushou@hiroshima-u.ac.jp
authors.forename: Yuushou
authors.initials: Y
authors.lastname: Nakayama
authors.forename: Takeshi
authors.initials: T
authors.lastname: Shiono
mesh_terms: D002384:Catalysis; D009942:Organometallic Compounds / Q000138:chemical synthesis* / Q000737:chemistry; D011108:Polymers / Q000138:chemical synthesis; D013237:Stereoisomerism; D015040:Zirconium / Q000737:chemistry
chemical_list: D009942:Organometallic Compounds; D011108:Polymers; C013108:metallocene; C023398:Zirconocene dichloride; D015040:Zirconium