198057-99-7Relevant academic research and scientific papers
Phenoxy substituted zirconocenes in ethylene polymerization
Repo, Timo,Jany, Gerhard,Salo, Mia,Polamo, Mika,Leskelae, Markku
, p. 363 - 366 (1997)
Zirconocene dichloride was reacted with either 2,6-di-tert-butyl-or 2,6-diisopropyl phenol to form bis(η5-cyclopentadienyl) zirconium(IV) monochloride complexes 1 and 2 respectively. A bisphenoxy derivative of Cp2ZrCl2, 3, was formed, when sterically less demanding 2,6-dimethyl phenol was utilized. The ability of the complexes 1, 2 and 3 in ethylene polymerization with MAO as cocatalyst was examined. Polymer analysis indicates that, regardless of which complex was used, only one kind of catalytically active metal center is formed and polymer properties resemble those obtained with the Cp2ZrCl2/MAO system. The solid state structure of bis(η5-cyclopentadienyl) zirconium(IV) 2,6-di-tert-butyl-phenoxy monochloride (1) is reported.
New O- and N-bonded zirconocene complexes and their catalytic properties in ethylene polymerization. X-ray crystal structure of (C5H5)2Zr{2,6-OC6H 3(CH3)2}2, (C5H5)2Zr{2,4,6-OC6H 2(CH3)3}2
Benetollo,Cavinato,Crosara,Milani,Rossetto,Scelza,Zanella
, p. 177 - 185 (2007/10/03)
A series of zirconocene complexes of formula Cp2ZrMe2-nLn where Cp = C5H-5, Me = methyl, L = pyrazolyl, bis(N,N′-phenylformamidinato), or substituted aryloxide and n = 1,2, were synthesized by reaction of Cp2ZrCl2 and Cp2ZrMe2 with LiL or HL, respectively. The structures of Cp2Zr(2,6-OC6H3Me2)2, Cp2Zr(2,4,6-OC6H2Me3)2 and Cp2ZrMe{CH(NC6H5)2} were determined by single crystal X-ray diffraction. The complexes demonstrate appreciable activity for ethylene polymerization when used as cocatalysts with methylaluminoxane and dimethylanilinium tetrafluorophenylborate.
