Kinetics and Catalysis

, 50:676

Synthesis and reactivity of trimethylsilyl substituted mono(cyclopentadienyl)titanium alkyl complexes

Article

DOI: 10.1134/S0023158409050097

Cite this article as:
Saßmannshausen, J. & Baumgartner, J. Kinet Catal (2009) 50: 676. doi:10.1134/S0023158409050097

Abstract

The preparation of a series of titanium half-sandwich compounds [Ti(η5-C5H5−x(SiMe3)xR3] (x = 1–3, R = Cl, Me) and their reactivity for propene polymerization is reported. The compounds 1–3 polymerize propene, albeit in a much lower activity than the reported [Ti(η5-C5Me5Me3]/B(C6F5)3 catalyst. Unlike the reported [Ti(η5-C5Me5Me3]/B(C6F5)3 catalyst, the quasi living polymerization was not observed. Instead, we observe rather unusual temperature effects when the trityl salt [Ph3C][B(C6F5)4] was used as activator. The activity increases with increasing temperature, whereas when B(C6F5)3 is used a decrease is observed The rather broad (>2) PDI indicates multisite catalysts, and 13C-NMR indicates predominantly atactic polypropene. The solid state structure of the hydrolysis product [{Ti(η5-C5H4(SiMe3)Cl2}O] (4) was determined.

Copyright information

© Pleiades Publishing, Ltd. 2009

Authors and Affiliations

  1. 1.Department of Pure and Applied ChemistryUniversity of StrathclydeSt. GlasgowUK
  2. 2.Institute of Inorganic ChemistryTU-GrazGrazAustria

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