Bimetallic effects on ethylene polymerization in the presence of amines: inhibition of the deactivation by Lewis bases.
Dinickel complexes supported by terphenyl ligands appended with phenoxy and imine donors were synthesized. Full substitution of the central arene blocks rotation around the aryl-aryl bond and allows for the isolation of atropisomers. The reported complexes perform ethylene polymerization in the presence of amines. The inhibiting effect of polar additives is up to 250 times lower for the syn isomer than the anti isomer. Comparisons with mononuclear systems indicate that the proximity of the metal centers leads to the observed inhibitory effect on the deactivation of the catalysts.
Department of Chemistry and Chemical Engineering, California Institute of Technology, 1200 East California Boulevard, MC 127-72, Pasadena, California 91125, USA.
Madalyn R
MR
Radlauer
Michael W
MW
Day
Theodor
T
Agapie
D000588:Amines / Q000737:chemistry*; D056831:Coordination Complexes / Q000737:chemistry*; D005030:Ethylenes / Q000737:chemistry*; D058115:Lewis Bases / Q000737:chemistry*; D009532:Nickel / Q000737:chemistry*; D058105:Polymerization
D000588:Amines; D056831:Coordination Complexes; D005030:Ethylenes; D058115:Lewis Bases; D009532:Nickel; C036216:ethylene