Artículo de revista
Tris(pyrazolyl)methane-chromium(III) complexes as highly active catalysts for ethylene polymerization
Fecha
2006-12-15Registro en:
JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL Volume: 260 Issue: 1-2 Pages: 70-76 Published: DEC 15 2006
1381-1169
Autor
García Orozco, Iván
Quijada Abarca, Juan
Vera, Karen
Valderrama, Mauricio
Institución
Resumen
Reaction of complex CrCl3 (THF)(3) with the tris(pyrazolyl)methane ligands, HC(Pz)(3), HC(3,5-Me(2)Pz)(3) and their substituted derivatives RC(Pz)(3) (R = Me, CH2OH, CH2OSO2Me) in THF lead to the formation of neutral complexes of the types [RC(PZ)(3)CrCl3] and [RC(3,5-Me(2)PZ)(3)CrCl3]. After reaction with methylalumoxane (MAO) these complexes are active in the polymerization of ethylene. The substituent on the methane central carbon atom of the ligand has some influence in polymerization behavior. This compounds present higher activities than similar chromium complexes, in the ethylene polymerization reaction.