title: Highly Tactic Cyclic Polynorbornene: Stereoselective Ring Expansion Metathesis Polymerization of Norbornene Catalyzed by a New Tethered Tungsten-Alkylidene Catalyst.
abstract: The tungsten alkylidyne [(t)BuOCO]W≡C((t)Bu) (THF)2 (1) reacts with CO2, leading to complete cleavage of one C═O bond, followed by migratory insertion to generate the tungsten-oxo alkylidene 2. Complex 2 is the first catalyst to polymerize norbornene via ring expansion metathesis polymerization to yield highly cis-syndiotactic cyclic polynorbornene.
authors.affiliation: Center for Catalysis and ‡George & Josephine Butler Polymer Research Laboratory, Department of Chemistry, Center for Macromolecular Science & Engineering, University of Florida , P.O. Box 117200, Gainesville, Florida 32611, United States.
authors.forename: Stella A
authors.initials: SA
authors.lastname: Gonsales
authors.affiliation: Center for Catalysis and ‡George & Josephine Butler Polymer Research Laboratory, Department of Chemistry, Center for Macromolecular Science & Engineering, University of Florida , P.O. Box 117200, Gainesville, Florida 32611, United States.
authors.forename: Tomohiro
authors.initials: T
authors.lastname: Kubo
authors.affiliation: Center for Catalysis and ‡George & Josephine Butler Polymer Research Laboratory, Department of Chemistry, Center for Macromolecular Science & Engineering, University of Florida , P.O. Box 117200, Gainesville, Florida 32611, United States.
authors.forename: Madison K
authors.initials: MK
authors.lastname: Flint
authors.affiliation: Center for Catalysis and ‡George & Josephine Butler Polymer Research Laboratory, Department of Chemistry, Center for Macromolecular Science & Engineering, University of Florida , P.O. Box 117200, Gainesville, Florida 32611, United States.
authors.forename: Khalil A
authors.initials: KA
authors.lastname: Abboud
authors.affiliation: Center for Catalysis and ‡George & Josephine Butler Polymer Research Laboratory, Department of Chemistry, Center for Macromolecular Science & Engineering, University of Florida , P.O. Box 117200, Gainesville, Florida 32611, United States.
authors.forename: Brent S
authors.initials: BS
authors.lastname: Sumerlin
authors.affiliation: Center for Catalysis and ‡George & Josephine Butler Polymer Research Laboratory, Department of Chemistry, Center for Macromolecular Science & Engineering, University of Florida , P.O. Box 117200, Gainesville, Florida 32611, United States.
authors.forename: Adam S
authors.initials: AS
authors.lastname: Veige