title: Alternating ethylene-norbornene copolymerization catalyzed by cationic organopalladium complexes bearing hemilabile bidentate ligands of alpha-amino-pyridines.
abstract: Cationic methylpalladium complexes with hemilabile bidentate ligands of alpha-amino-pyridines, in the form of {[R(1)HNCR(2)H(o-C(6)H(5)N)]Pd(Me)(NCMe)}(BF(4)) (R(1) = (i)Pr, (t)Bu, Ar R(2) = H, Me) have been found to be effective precursors for catalytic copolymerization of ethylene and norbornene under mild conditions. The copolymer products exhibit predominant alternating microstructures which are evidenced by NMR and mass spectrometry as well as a kinetic analysis according to the Finman-Ross relationship.
authors.affiliation: Department of Chemistry, National Taiwan University, No 1, Section 4, Roosevelt Road, Taipei, Taiwan 106.
authors.forename: Ya-Chi
authors.initials: YC
authors.lastname: Lin
authors.forename: Kuo-Hsuan
authors.initials: KH
authors.lastname: Yu
authors.forename: Shou-Ling
authors.initials: SL
authors.lastname: Huang
authors.forename: Yi-Hung
authors.initials: YH
authors.lastname: Liu
authors.forename: Yu
authors.initials: Y
authors.lastname: Wang
authors.forename: Shiuh-Tzung
authors.initials: ST
authors.lastname: Liu
authors.forename: Jwu-Ting
authors.initials: JT
authors.lastname: Chen
mesh_terms: D000631:Aminopyridines / Q000737:chemistry*; D002384:Catalysis; D002412:Cations; D002614:Chelating Agents / Q000737:chemistry*; D005030:Ethylenes / Q000138:chemical synthesis* / Q000737:chemistry; D007700:Kinetics; D008024:Ligands; D009682:Magnetic Resonance Spectroscopy; D013058:Mass Spectrometry; D008956:Models, Chemical; D009636:Norbornanes / Q000138:chemical synthesis* / Q000737:chemistry; D009942:Organometallic Compounds / Q000737:chemistry*; D010165:Palladium / Q000737:chemistry*; D011108:Polymers / Q000138:chemical synthesis* / Q000737:chemistry
chemical_list: D000631:Aminopyridines; D002412:Cations; D002614:Chelating Agents; D005030:Ethylenes; D008024:Ligands; D009636:Norbornanes; D009942:Organometallic Compounds; D011108:Polymers; D010165:Palladium; C036216:ethylene