RT info:eu-repo/semantics/article
T1 Group 4 metallocene complexes with non-bridged and tetramethyldisiloxane-bridged methyl-phenyl-cyclopentadienyl ligands: synthesis, characterization and olefin polymerization studies
A1 Martínez Martínez, Gema
A1 Royo Gracia, Pascual
A1 González Mosquera, Marta Elena
K1 Cyclopentadienyl
K1 Zirconium
K1 Hafnium
K1 Disiloxane
K1 ansa-Metallocenes
K1 Olefin-Polymerization
K1 Ciencia
K1 Química inorgánica
K1 Science
K1 Chemistry, inorganic
AB The non-vicinal methyl-phenyl-substituted zirconocene dichlorides meso-and rac-[Zr{η5-(1-Ph-3-Me-C5H3)}2Cl2] and [Zr(η5-C5H5){η5-(1-Ph-3-Me-C5H3)}Cl2] have been isolated by transmetallation of the lithium salt Li(1-Ph-3-Me-C5H3) to ZrCl4(THF)2 and [Zr(η5-C5H5)Cl3 · DME] (DME = dimethoxyethane), respectively. Similar transmetallation of the lithium salt Li2[(Me-Ph-C5H2SiMe2)2O] to MCl4 gave the ansa-metallocenes [M{η5-(Me-Ph-C5H2SiMe2)2O}Cl2] (M = Zr, Hf) for which the meso- and rac-diastereomers were separated. The dimethyl and dibenzyl derivatives of these metallocenes were also prepared and the structure of all of these compounds determined by NMR spectroscopy. The molecular structure of rac-[Zr{η5-(2-Me-4-Ph-C5H2SiMe2)2O}Cl2] was determined by single crystal X-ray diffraction methods. The activity of the dichlorometallocenes/MAO catalysts for ethene and propene polymerization was evaluated.
PB Elsevier
SN 0022-328X
YR 2004
FD 2004
LK http://hdl.handle.net/10017/4179
UL http://hdl.handle.net/10017/4179
LA eng
NO Ministerio de Educación, Cultura y Deporte
DS MINDS@UW
RD 23-abr-2024