Alternating ethylene-norbornene copolymerization catalyzed by cationic organopalladium complexes bearing hemilabile bidentate ligands of alpha-amino-pyridines.
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.
Lin
Ya-Chi
YC
Department of Chemistry, National Taiwan University, No 1, Section 4, Roosevelt Road, Taipei, Taiwan 106.
Yu
Kuo-Hsuan
KH
Huang
Shou-Ling
SL
Liu
Yi-Hung
YH
Wang
Yu
Y
Liu
Shiuh-Tzung
ST
Chen
Jwu-Ting
JT
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
D000631:Aminopyridines; D002412:Cations; D002614:Chelating Agents; D005030:Ethylenes; D008024:Ligands; D009636:Norbornanes; D009942:Organometallic Compounds; D011108:Polymers; D010165:Palladium; C036216:ethylene