Non-cyclopentadienyl zirconium complexes as catalysts for 1-hexene polymerization |
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Authors: | Davide Baù ,Laura Crociani,Gino Paolucci,Gilberto Rossetto |
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Affiliation: | a CNR Instituto di Chimica Inorganica e delle Superfici, C.so Stati Uniti 4, CNR, 35127 Padova, Italy b Dipartimento di Chimica, Università Ca’ Foscari di Venezia, Dorsoduro 2137, 30123 Venezia, Italy |
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Abstract: | The new β-diketonate complexes (hfac)2ZrCl2, (hfac)3ZrCl, hfac = hexafluoroacetylacetonate, and (thd)2ZrCl2, thd = 2,2,6,6-tetramethyl-3,5-heptanedionate, have been prepared in good yield by reacting the corresponding β-diketonate thallium complexes with ZrCl4 in stoichiometric amounts and they have been characterized by elemental analyses and NMR spectra.These complexes and the β-diketonate complexes (acac)2ZrCl2, (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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Keywords: | Zirconium complexes Catalysts Polymerization 1-Hexene |
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