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Solid state structure of Bi(N3)3, Bi(N3)3·solvates and the structural dynamics in the [Bi(N3)6]3- anion
Kati Rosenstengel1, Axel Schulz, Alexander Villinger
1Abteilung Anorganische Chemie, Institut für Chemie, Universität Rostock, Albert-Einstein-Strasse 3a, 18059 Rostock, Germany.
Pure bismuth triazide, a highly explosive compound, was synthesized using bismuth trifluoride and trimethylsilyl azide under specific solvothermal conditions. Solvent choice significantly impacts azide product purity, with further studies on structural dynamics and ligand exchange reactions.
Area of Science:
- Inorganic Chemistry
- Materials Science
- Solid-State Chemistry
Background:
- Bismuth azides are known for their explosive properties.
- Understanding the synthesis and stability of bismuth azides is crucial for safety and potential applications.
Purpose of the Study:
- To synthesize pure bismuth triazide (Bi(N3)3).
- To investigate the influence of solvents on azide product purity.
- To study the structural dynamics and ligand exchange reactions of bismuth azides.
Main Methods:
- Solvothermal synthesis using bismuth trifluoride (BiF3) and trimethylsilyl azide (Me3SiN3).
- Characterization using X-ray diffraction, (14)N NMR, infrared, and Raman spectroscopy.
- Temperature-dependent single-crystal X-ray diffraction and Raman studies.
Main Results:
- Pure bismuth triazide (Bi(N3)3) was successfully synthesized under solvothermal conditions (90-100 °C).
- Solvent choice critically affects the purity of Bi(N3)3 and the [Bi(N3)6](3-) ion.
- Temperature-dependent structural dynamics and azido-chlorido ligand exchange were observed and characterized.
Conclusions:
- The solvothermal method provides a route to pure bismuth triazide.
- Solvent selection is paramount for controlling the purity and properties of bismuth azide compounds.
- Bismuth azides exhibit complex structural dynamics and ligand exchange behaviors influenced by their environment.
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