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Titanium alkoxide complexes: condensed phase and gas phase comparisons.

S M Damo1, K C Lam, A Rheingold

  • 1Department of Chemistry, New York University, New York, New York 10003, USA.

Inorganic Chemistry
|January 16, 2003
PubMed
Summary
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A new titanium complex, [Ti(2,4-dimethyl-2,4-pentanediolate)2]2, remains stable as a dimer in both solid and gas phases. This dimeric stability in the gas phase distinguishes it from other titanium alkoxide complexes.

Area of Science:

  • Organometallic Chemistry
  • Inorganic Chemistry
  • Materials Science

Background:

  • Titanium alkoxide complexes are crucial in various chemical applications.
  • Understanding the aggregation state of these complexes is vital for their reactivity and stability.
  • Previous studies on simple titanium alkoxides like [Ti(OiPr)4] and [Ti(OMe)4] showed complex aggregation behavior.

Purpose of the Study:

  • To synthesize and characterize a novel titanium complex with 2,4-dimethyl-2,4-pentanediolate ligands.
  • To investigate the stability and nuclearity of this complex in both solid and gas phases.
  • To compare its behavior with other known titanium alkoxide complexes.

Main Methods:

  • Synthesis via transesterification of [Ti(OiPr)4] with 2,4-dimethyl-2,4-pentanediol.

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  • Solid-state structural analysis using single-crystal X-ray diffraction.
  • Gas-phase characterization employing desorption chemical ionization mass spectrometry (DCI-MS).

    • Main Results:

    • The synthesized complex, [Ti(2,4-dimethyl-2,4-pentanediolate)2]2 (1), was successfully prepared.
    • X-ray diffraction confirmed the dimeric structure in the solid state.
    • DCI-MS revealed that complex 1 retains its dimeric form in the gas phase, unlike other titanium alkoxides.
    • [Ti(OiPr)4] was also found to be principally dimeric in the gas phase.

    Conclusions:

    • Complex 1 exhibits exceptional stability as a dimer in both condensed and gas phases.
    • The gas-phase nuclearity of titanium alkoxide complexes can indicate their aggregation state in condensed phases.
    • This study provides insights into the structural behavior of titanium alkoxide complexes, with implications for their synthesis and application.