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Related Experiment Videos

Early transition-metal perfluoroalkyl complexes.

Felicia L Taw1, Brian L Scott, Jaqueline L Kiplinger

  • 1Chemistry Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA.

Journal of the American Chemical Society
|December 4, 2003
PubMed
Summary
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Researchers synthesized and characterized novel titanium perfluoroalkyl complexes for the first time. These stable compounds, featuring a robust titanium-trifluoromethyl bond, were created using a new trifluoromethyl group-transfer reagent.

Area of Science:

  • Organometallic Chemistry
  • Fluorine Chemistry
  • Materials Science

Background:

  • Early transition-metal perfluoroalkyl complexes are challenging to synthesize and characterize.
  • Understanding the stability and reactivity of metal-carbon bonds in perfluoroalkyl complexes is crucial for developing new materials and catalysts.

Purpose of the Study:

  • To isolate and structurally characterize elusive early transition-metal perfluoroalkyl complexes.
  • To investigate the stability of the titanium-trifluoromethyl (Ti-CF3) linkage.
  • To explore the utility of trifluoromethyltrimethylsilane as a trifluoromethyl group-transfer reagent.

Main Methods:

  • Reaction of titanium(IV) fluoride complex Cp2TiF2 with trifluoromethyltrimethylsilane (CF3SiMe3).
  • Subsequent reaction with trimethylsilyltriflate (Me3SiOTf).

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  • Characterization using spectroscopic methods and single-crystal X-ray analysis.

    • Main Results:

    • Successful synthesis and isolation of novel titanium(IV) trifluoromethyl fluoride (Cp2Ti(CF3)(F)) and titanium(IV) trifluoromethyl triflate (Cp2Ti(CF3)(OTf)) complexes.
    • Structural characterization confirmed the formation of these unique compounds.
    • The titanium-trifluoromethyl linkage was found to be remarkably robust, with no alpha-fluoride interaction observed.

    Conclusions:

    • Trifluoromethyltrimethylsilane is an effective reagent for introducing trifluoromethyl groups onto early transition metals.
    • The synthesized titanium perfluoroalkyl complexes represent a significant advancement in organometallic chemistry.
    • The robust Ti-CF3 bond suggests potential applications in catalysis and materials science.