title: A C2-symmetric, living alpha-diimine Ni(II) catalyst: regioblock copolymers from propylene.
abstract: An isomerically pure, C2-symmetric Ni(II) complex was synthesized and found to be living for propylene polymerization. The regioselectivity of the catalyst varied greatly with reaction temperature, with regioregular, highly isotactic polypropylene (PP) produced at low temperatures, and regioirregular PP produced at high temperatures. Regioblock PP was formed by changing the reaction temperature during the polymerization.
authors.affiliation: Department of Chemistry and Chemical Biology, Baker Laboratory, Cornell University, Ithaca, New York 14853-1301, USA.
authors.forename: Anna E
authors.initials: AE
authors.lastname: Cherian
authors.forename: Jeffrey M
authors.initials: JM
authors.lastname: Rose
authors.forename: Emil B
authors.initials: EB
authors.lastname: Lobkovsky
authors.forename: Geoffrey W
authors.initials: GW
authors.lastname: Coates
mesh_terms: D000475:Alkenes / Q000138:chemical synthesis* / Q000737:chemistry; D018360:Crystallography, X-Ray; D007097:Imines / Q000737:chemistry; D008958:Models, Molecular; D015394:Molecular Structure; D009532:Nickel / Q000737:chemistry*; D009942:Organometallic Compounds / Q000737:chemistry*
chemical_list: D000475:Alkenes; D007097:Imines; D009942:Organometallic Compounds; D009532:Nickel; C013658:propylene