Abstract
The new β-diketonate complexes (hfac) 2ZrCl 2, (hfac) 3ZrCl, hfac = hexafluoroacetylacetonate, and (thd) 2ZrCl 2, thd = 2,2,6,6-tetramethyl-3,5-heptanedionate, have been prepared in good yield by reacting the corresponding β-diketonate thallium complexes with ZrCl 4 in stoichiometric amounts and they have been characterized by elemental analyses and NMR spectra. These complexes and the β-diketonate complexes (acac) 2ZrCl 2, (acac) 3ZrCl and (thd) 3ZrCl have been tested as catalysts in the polymerization of 1-hexene in the presence of N, N′-(dimethylanilinium)-tetrakis(pentafluorophenylborate) or ethyltrichloroacetate as co-catalysts at room temperature using ethyl aluminum sesquichloride as scavenger.
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