Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/23499
Type: Artigo de periódico
Title: Compostos organolantanídeos contendo o ligante pirazinamida: síntese, caracterização e atividade catalítica na polimerização do etileno
Title Alternative: Organolanthanide compounds containing the pirazinamide ligand: synthesis, characterization and catalytic activity in ethylene polymerization
Author: Miotti, Renata Diana
Maia, Alessandra de Souza
Oliveira, Wanda de
Paulino, Ícaro Sampaio
Schuchardt, Ulf
Abstract: In this work we report the synthesis of some organolanthanide compounds which were identified as LnCl2Cp(PzA)2, Ln = Nd, Sm, Eu and Tb, Cp = cyclopentadienyl and PzA = pirazinamide, by elemental analyses, complexometric titration with EDTA, thermal analyses and IR spectra. Thermal analysis and infrared spectra indicated that the coordination of the pyrazinamide to the lanthanide ions was made by the O atom of the carbonyl group and by one or both N atoms of the pyrazinamide ring. This class of compound showed catalytic activity of ca. 4.0 to 6.4 kgPE molLn-1 h-1 bar-1, in ethylene polymerization, using methylaluminoxane as cocatalyst. The resulting polyethylene presented low crystallinity (20%).
Subject: organolanthanides
cyclopentadienyl
ethylene
Editor: Sociedade Brasileira de Química
Rights: aberto
Identifier DOI: 10.1590/S0100-40422002000500011
Address: http://dx.doi.org/10.1590/S0100-40422002000500011
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422002000500011
Date Issue: 1-Sep-2002
Appears in Collections:Artigos e Materiais de Revistas Científicas - Unicamp

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