Silicon-carbon bridged bis(fluorenyl) and bis(octahydrofluorenyl) ansa-zirconocenes: synthesis, characterization and ethylene polymerization catalysis

R Leino, HJG Luttikhedde, A Lehtonen, JH Nasman, Carl-Eric Wilen

Research output: Contribution to journalArticleScientificpeer-review

10 Citations (Scopus)

Abstract

The synthesis and characterization of two new silicon-carbon bridged ansa-bis(fluorenyl) and ansa-bis(octahydrofluorenyl) zirconocene complexes, (Flu-CH(2)-SiMe(2)-Flu)ZrCl(2) (3) and (FluH(8)-CH(2)-SiMe(2)-FluH(8))ZrCl(2) (4) is reported. Complex 3, in combination with methylaluminoxane (MAO), forms an active catalyst system for homogeneous polymerization of ethylene. The molecular structure of 4 reveals a large Centroid-Zr-Centroid angle (131.9 degrees) and an unusually small Cl-Zr-Cl angle (93.2 degrees). The Zr-C bond distances range from 2.48 to 2.64 Angstrom. (C) 1997 Elsevier Science S.A.
Original languageEnglish
Pages (from-to)219-224
Number of pages6
JournalJournal of Organometallic Chemistry
Volume545
Publication statusPublished - 30 Oct 1997
MoE publication typeA1 Journal article-refereed

Keywords

  • fluorenyl
  • zirconium
  • ansa-metallocene
  • olefin polymerization

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