A series of new bis(indenyl)zirconium diaryloxides of general formula Ind2Zr(OL)2 (L = C6H5, C6F5, 2,6-Me2C6H3, 2,4,6Me3C6H2, 4-tBUC6H4, were synthesized by a metathesis reaction of Ind2ZrC12 with the appropriate thallium aryloxide salt, Tl0L. The complexes were characterized by 1H and 13C NMR techniques. They were also examined as catalysts for ethene and 1-hexene polymerization with methylalumoxane as co-catalyst, and a trend of the polymerization activity as a funetion of aryloxide ligands was observed. An interpretation of this trend, considering both the electronic and steric effects of the substituents on the aryloxide rings, was proposed.
Syntesis and characterization of bis(insenyl) zirconium aryloxide derivatives and their use in alpha-olefin polymerization.
Zanella P;Rossetto G;Carta G
2001
Abstract
A series of new bis(indenyl)zirconium diaryloxides of general formula Ind2Zr(OL)2 (L = C6H5, C6F5, 2,6-Me2C6H3, 2,4,6Me3C6H2, 4-tBUC6H4, were synthesized by a metathesis reaction of Ind2ZrC12 with the appropriate thallium aryloxide salt, Tl0L. The complexes were characterized by 1H and 13C NMR techniques. They were also examined as catalysts for ethene and 1-hexene polymerization with methylalumoxane as co-catalyst, and a trend of the polymerization activity as a funetion of aryloxide ligands was observed. An interpretation of this trend, considering both the electronic and steric effects of the substituents on the aryloxide rings, was proposed.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
