Synthesis of titanium(IV) complexes that contain the Bis(silylamide) ligand of the type [1,8-C10H6(NR)2]2-, and alkene polymerization catalyzed by [1,8-C10H6(NR)2]TiCl2-cocatalyst system

Kotohiro Nomura, Naofumi Naga, Kazuo Takaoki, Akio Imai

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[1,8-C10H6(NR)2]TiCl2 (3; R = SiMe3, Si(i)BuMe2, Si(i)Pr3) complexes have been prepared from dilithio salts [1,8-C10H6(NR)2]Li2 (2) and TiCl4 in diethyl ether in moderate yields (60-63%). These complexes showed significant catalytic activities for ethylene polymerization and for ethylene/1-hexene copolymerization in the presence of methylaluminoxane (MAO), methyl isobutyl aluminoxane (MMAO), Al(i)Bu3- or AlEt3-Ph3CB(C6F5)4 as a cocatalyst. The catalytic activities performed in heptane (cocatalyst MMAO) were higher than those carried out in toluene (cocatalyst MAO): 709 kg-PE/mol-Ti · h could be attained for ethylene polymerization by using [1,8-C10H6(NSi(i)BuMe2)2]TiCl2-MMAO catalyst system.

Original languageEnglish
JournalJournal of Molecular Catalysis A: Chemical
Issue number3
Publication statusPublished - 1998 Apr 3
Externally publishedYes



  • Alkene polymerization
  • Bis(silylamide) ligand
  • Metal complexes

ASJC Scopus subject areas

  • Catalysis
  • Process Chemistry and Technology

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