<?xml version="1.0" encoding="UTF-8"?><xml><records><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Liu, Hua-Rong</style></author><author><style face="normal" font="default" size="100%">Gomes, P. T.</style></author><author><style face="normal" font="default" size="100%">Costa, S. I.</style></author><author><style face="normal" font="default" size="100%">Duarte, M. T.</style></author><author><style face="normal" font="default" size="100%">Branquinho, R.</style></author><author><style face="normal" font="default" size="100%">Fernandes, A. C.</style></author><author><style face="normal" font="default" size="100%">Chien, J. C. W.</style></author><author><style face="normal" font="default" size="100%">Singh, R. P.</style></author><author><style face="normal" font="default" size="100%">Marques, Maria M.</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Highly active new alpha-diimine nickel catalyst for the polymerization of alpha-olefins</style></title><secondary-title><style face="normal" font="default" size="100%">Journal of Organometallic Chemistry</style></secondary-title></titles><keywords><keyword><style  face="normal" font="default" size="100%">alpha-diimine nickel complex</style></keyword><keyword><style  face="normal" font="default" size="100%">Ethylene polymerization</style></keyword><keyword><style  face="normal" font="default" size="100%">late transition-metal</style></keyword><keyword><style  face="normal" font="default" size="100%">propylene polymerization</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">2005</style></year><pub-dates><date><style  face="normal" font="default" size="100%">MAR</style></date></pub-dates></dates><number><style face="normal" font="default" size="100%">5</style></number><publisher><style face="normal" font="default" size="100%">ELSEVIER SCIENCE SA</style></publisher><pub-location><style face="normal" font="default" size="100%">PO BOX 564, 1001 LAUSANNE, SWITZERLAND</style></pub-location><volume><style face="normal" font="default" size="100%">690</style></volume><pages><style face="normal" font="default" size="100%">1314-1323</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">&lt;p&gt;A new silylated alpha-diimine ligand, bis[N,N `-(4-tert-butyl-diphenylsilyl-2,6-diisopropylphenyl)imino]acenaphthene 3, and its corresponding Ni(II) complex, {bis[N,N `-(4-tert-butyl-diphenylsilyl-2,6-diisopropylphenyl)imino]acenaphthene} dibromonickel 4, have been synthesized and characterized. The crystal structures of 3 and 4 were determined by X-ray crystallography. In the solid state, complex 4 is a dimer with two bridging Br ligands linking the two nickel centers, which have square pyramidal geometries. Complex 4, activated either by diethylaluminum chloride (DEAC) or methylaluminoxane (MAO) produces very active catalyst systems for the polymerization of ethylene and moderately active for the polymerization of propylene. The activity values are in the order of magnitude of 10(7) g PE (mol Ni [E] h)(-1) for the polymerization of ethylene and of 10(5) g PP (mol Ni [P] h)(-1) for the polymerization of propylene. NMR analysis shows that branched polyethylenes (PE) are obtained at room or higher temperatures and almost linear PE is obtained at 0 degrees C with 4/DEAC. (c) 2004 Elsevier B.V. All rights reserved.&lt;/p&gt;</style></abstract><issue><style face="normal" font="default" size="100%">5</style></issue><work-type><style face="normal" font="default" size="100%">Article</style></work-type><custom3><style face="normal" font="default" size="100%">Foreign</style></custom3><custom4><style face="normal" font="default" size="100%">2.336</style></custom4></record><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Rajesh, A.</style></author><author><style face="normal" font="default" size="100%">Sivaram, S.</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Polymerization of ethylene to branched poly(ethylene)s using ansa-eta(5)-monofluorenyl cyclohexanolato zirconium(IV) complex/methylaluminoxane</style></title><secondary-title><style face="normal" font="default" size="100%">Polymer Bulletin</style></secondary-title></titles><keywords><keyword><style  face="normal" font="default" size="100%">ansa-Monofluorenyl complex</style></keyword><keyword><style  face="normal" font="default" size="100%">Bimodal MWD</style></keyword><keyword><style  face="normal" font="default" size="100%">Branched poly(ethylene)s</style></keyword><keyword><style  face="normal" font="default" size="100%">Ethylene polymerization</style></keyword><keyword><style  face="normal" font="default" size="100%">Methyl aluminoxane</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">2011</style></year><pub-dates><date><style  face="normal" font="default" size="100%">JUL</style></date></pub-dates></dates><number><style face="normal" font="default" size="100%">3</style></number><publisher><style face="normal" font="default" size="100%">SPRINGER</style></publisher><pub-location><style face="normal" font="default" size="100%">233 SPRING ST, NEW YORK, NY 10013 USA</style></pub-location><volume><style face="normal" font="default" size="100%">67</style></volume><pages><style face="normal" font="default" size="100%">383-399</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">&lt;p&gt;ansa-eta(5)-Monofluorenyl cyclohexanolato zirconium complex 3 was shown to be active for the polymerization of ethylene when activated with methylaluminoxane (MAO) at 5 bar. Up to a polymerization temperature of 40 A degrees C, 3/MAO resulted in linear poly(ethylene)s with saturated chain ends. However, at polymerization temperatures of 60, 80, and 100 A degrees C, a mixture of branched poly(ethylene)s, linear alpha-olefins and long chain alkanes was obtained. The poly(ethylene)s produced at 80 and 100 A degrees C exhibited a bimodal molecular weight distribution indicative of multiple active species. Very high molecular weight (M (v) &amp;gt; 5 x 10(5)) linear poly(ethylene)s were obtained using 3/MAO at 25 A degrees C.&lt;/p&gt;</style></abstract><issue><style face="normal" font="default" size="100%">3</style></issue><custom3><style face="normal" font="default" size="100%">Foreign</style></custom3><custom4><style face="normal" font="default" size="100%">1.532
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