Synthesis of titanium(IV) complexes that contain the bis(silylamide) ligand of the type 1,8H10NRM2- (R=SiMe3; Si'BulVte, Si'Pr3), and olefin polymerization catalyzed by the [WioHelNRfe] TWWXsCI, brcocatalyst system

Kazuo Takaoki, Kotohiro Nomura, Naofumi Naga, Akio Imai

研究成果: Article査読

3 被引用数 (Scopus)

抄録

[l,8-C,0H6(NSi'BuMe2)2]TiBr2 (4) has been prepared from dilithio salts [l,8-CinH6(NR),]Li, (2) and TiBr4 in Et2O. This complex showed significant catalytic activity for ethylene polymerization in the presence of a cocatalyst, and the activity is the same as those obtained by using chloride analogues such as [1,8-C10H6(NR)2] TiCl2 (3: R = SiMe3 Si'BuMe2 Si'Pr,). The effective cocatalyst was, however, different between the chloride and the bromide complexes. [ArNCH2CH2CH2NAr]TiCl2 (5, Ar = 2,6-iPr2C6H3), which has been known as an effective catalyst for polymerization of 1-hexene, showed lower activity under the same conditions. The broad molecular weight distributions (Mw/Mn for the resultant polymer can be attributed to the scission of titanium-nitrogen bond by cocatalyst, because the narrow MJMnvalue (1.8) was observed if the polymerization was stopped at the initial stage (2 min) under the same reaction conditions.

本文言語English
ページ(範囲)469-472
ページ数4
ジャーナルStudies in Surface Science and Catalysis
121
DOI
出版ステータスPublished - 1999
外部発表はい

ASJC Scopus subject areas

  • Catalysis
  • Condensed Matter Physics
  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films
  • Materials Chemistry

フィンガープリント 「Synthesis of titanium(IV) complexes that contain the bis(silylamide) ligand of the type 1,8H<sub>10</sub>NRM2- (R=SiMe<sub>3</sub>; Si'BulVte, Si'Pr<sub>3</sub>), and olefin polymerization catalyzed by the [WioHelNRfe] TWWXsCI, brcocatalyst system」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

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