Kelin Li, J. Darkwa, I. Guzei
Oct 7, 2002
Citations
0
Influential Citations
65
Citations
Journal
Journal of Organometallic Chemistry
Abstract
Abstract The substituted pyrazole palladium complexes, (3,5- t Bu 2 pz) 2 PdCl 2 ( 1 ) (3,5-Me 2 pz) 2 PdCl 2 ( 2 ), (3-Mepz) 2 PdCl 2 ( 3 ) and (pz) 2 PdCl 2 ( 4 ) (pzH=pyrazole), can be prepared from the reaction of (COD)PdCl 2 with the appropriate pyrazole. The chloromethyl derivative, (3,5- t Bu 2 pz) 2 PdCl(Me) ( 5 ), was prepared from (COD)PdClMe and t Bu 2 pzH. X-ray crystal structure determination of 1 and 5 established their structures in the solid state to be the trans -isomer. After activation of 1 – 4 and 5 with methylaluminoxane (MAO) the resulting palladium complexes were used as catalysts in ethylene polymerization, yielding linear high-density polyethylene (HDPE). The highest activity was observed for (3,5- t Bu 2 pz)PdClMe.