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Researchers synthesized a novel supramolecular complex featuring high-valent thallium(III) and a "trapped" dichlorine molecule. This complex exhibits significant Cl···Cl noncovalent interactions and notable thermal stability.

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Area of Science:

  • Inorganic Chemistry
  • Supramolecular Chemistry
  • Halogen Bonding

Background:

  • High-valent thallium chemistry is less explored.
  • Supramolecular complexes offer unique structural motifs.
  • Halogen bonding interactions are crucial in molecular assembly.

Purpose of the Study:

  • To synthesize and characterize a novel supramolecular complex containing high-valent thallium(III).
  • To investigate the structural features of a "trapped" dichlorine unit within the complex.
  • To explore the nature of Cl-Cl noncovalent interactions and thermal stability.

Main Methods:

  • Single-crystal X-ray diffraction for structural determination.
  • Raman spectroscopy to analyze Cl-Cl halogen contacts.
  • Thermal analysis to assess stability.

Main Results:

  • The first supramolecular complex with high-valent thallium(III) and "trapped" dichlorine, (Me4N)3{[Tl2Cl9](Cl2)} (1), was successfully prepared.
  • X-ray crystallography confirmed the "trapped" Cl2 unit and significant Cl-Cl noncovalent interactions.
  • The complex displayed good thermal stability up to 140 °C, with Raman spectroscopy providing insights into halogen contacts.

Conclusions:

  • The successful synthesis and characterization of complex 1 expand the understanding of high-valent thallium chemistry.
  • The study highlights the role of Cl-Cl noncovalent interactions in stabilizing supramolecular structures.
  • This work provides a foundation for exploring similar halogen-bonded complexes.