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Titanium Imido Complexes Supported by Amidinate Ligands: Synthesis, Solution Dynamics, and Solid State Structures.

Peter J. Stewart1, Alexander J. Blake, Philip Mountford

  • 1Department of Chemistry, University of Nottingham, Nottingham NG7 2RD, U.K.

Inorganic Chemistry
|August 13, 1997
PubMed
Summary
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Titanium imido complexes with N,N’-bis(trimethylsilyl)benzamidinato ligands were synthesized and studied for their dynamic equilibria. Structural analysis of key compounds provides insights into their coordination chemistry.

Area of Science:

  • Organometallic Chemistry
  • Coordination Chemistry
  • Titanium Complexes

Background:

  • Titanium imido complexes are important in catalysis and materials science.
  • Amidinato ligands offer versatile coordination modes.
  • Understanding ligand dynamics is crucial for reactivity prediction.

Purpose of the Study:

  • To synthesize and characterize novel titanium imido complexes featuring N,N'-bis(trimethylsilyl)benzamidinato ligands.
  • To investigate the dynamic behavior of these complexes in solution.
  • To elucidate the structural features of representative compounds.

Main Methods:

  • Reaction of lithium amidinate with titanium imido precursors.
  • Spectroscopic characterization (NMR).
  • Kinetic and thermodynamic studies of ligand exchange.

Related Experiment Videos

  • X-ray crystallography for structural determination.

    • Main Results:

    • Synthesis of (N,N'-bis(trimethylsilyl)benzamidinato)titanium imido derivatives.
    • Observation of temperature-dependent dynamic equilibria involving pyridine ligand dissociation.
    • Determination of kinetic and thermodynamic parameters for the equilibria.
    • Structural elucidation of two representative complexes via X-ray diffraction.

    Conclusions:

    • The synthesized titanium imido complexes exhibit dynamic behavior in solution.
    • Ligand dissociation equilibria are influenced by enthalpy and entropy.
    • Structural data provide a basis for understanding the observed reactivity and dynamics.