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A Reaction Cycle for Octahedral Tungsten Iodide Clusters.

Markus Ströbele1, Hans-Jürgen Meyer1

  • 1Section for Solid State and Theoretical Inorganic Chemistry, Institute of Inorganic Chemistry, University of Tübingen , Auf der Morgenstelle 18, 72076 Tübingen, Germany.

Inorganic Chemistry
|April 29, 2017
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Summary

Researchers detailed a tungsten iodide reaction cycle, revealing new compounds W6I13 and α-W6I12. These transformations involve thermal changes and iodine release, impacting tungsten-iodine chemistry.

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Area of Science:

  • Inorganic Chemistry
  • Solid-State Chemistry
  • Materials Science

Background:

  • Tungsten iodide compounds exhibit complex thermal transformations.
  • Understanding reaction pathways is crucial for materials development.

Purpose of the Study:

  • To elucidate the reaction cycle of octahedral tungsten iodide compounds.
  • To characterize novel tungsten iodide phases and their transformations.

Main Methods:

  • Powder and single-crystal X-ray diffraction for structural characterization.
  • Differential scanning calorimetry for thermal analysis.

Main Results:

  • Identified a new compound, W6I13 (W6I12·xI2, 0 < x ≤ 1/2).
  • Discovered a new modification of W6I12, denoted as α-W6I12.
  • Established a reaction cycle involving W6I16, W6I13, α-W6I12, and β-W6I12.
  • Characterized the thermal decomposition of W6I16 and the phase transition of α-W6I12 to β-W6I12.

Conclusions:

  • The study reveals a detailed reaction cycle for tungsten iodides.
  • New structural insights into tungsten-iodine systems were gained.
  • The findings contribute to the understanding of solid-state reactions and phase transitions in inorganic compounds.