A new series of zirconium Metallocenes derived from partially alkylated s-indacene with potential applications in the polymerization of ethyleneReport as inadecuate




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This contribution describes the synthesis and characterization of a series of zirconium metallocenes derived from partially alkylated s-indacene. The complexes Cp*ZrCl2-s-Ic - H 1, Cp-ZrCl2-s-Ic - H 3 and CpZrCl2-s-Ic - H 4 s-Ic-H = 2,6-diethyl-4,8-dimethyl-1-hydro-s-indacene; s-Ic - H = 2,6-dibutyl-4,8-dimethyl-1-hydro-s-indacene were synthesized from the monolithiated salts of s-indacene s-Ic-H or s-Ic - H with one equivalent of C5R5ZrCl3 R = H, CH3. All complexes here reported were characterized by means of H-1 and C-13 NMR, mass spectrometry, elemental analysis. Complexes Cp*ZrCl2-s-Ic-H 1 and CpZrCl2-s-Ic-H 2 previously reported by NMR analysis were characterized by X-ray diffraction. In order to gain further knowledge about their catalytic behavior, the complexes were tested in the catalysis of ethylene polymerization showing a highest activity. Complex 4 presents the highest ethylene polymerization activity than complexes 1 and 2, and 3 under the same working conditions.Nota general

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Author: Araneda, Juan Felipe; - Morales Verdejo, César; - Adams, Christopher; - Martínez Díaz, Iván; - Chávez, Ivonne; - Garland, Ma

Source: http://repositorio.uchile.cl/



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