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Binary Zinc Azides.

Axel Schulz1,2, Alexander Villinger3

  • 1Institut für Chemie, Universität Rostock, Albert-Einstein-Strasse 3a, 18059, Rostock, Germany.

Chemistry (Weinheim an Der Bergstrasse, Germany)
|January 11, 2016
PubMed
Summary

This study reports the first successful synthesis and characterization of pure, solvent-free zinc azide (Zn(N₃)₂), including its polymorphs. Previous research on zinc azide compounds requires revision due to new findings.

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Area of Science:

  • Inorganic Chemistry
  • Materials Science
  • Crystallography

Background:

  • Zinc azide (Zn(N₃)₂) is an energetic material with limited structural data.
  • Previous syntheses and characterizations of zinc azide compounds may contain inaccuracies.

Purpose of the Study:

  • To synthesize and characterize pure, solvent-free zinc azide (Zn(N₃)₂) and its polymorphs for the first time.
  • To resolve discrepancies with previously reported data on zinc azide and related compounds.

Main Methods:

  • Synthesis of pure, solvent-free zinc azide (Zn(N₃)₂) via reaction of diethyl zinc and hydrazoic acid.
  • Single-crystal structure determination.
  • Comprehensive characterization of α-Zn(N₃)₂ and metastable polymorphs.
  • Reinvestigation of previous syntheses of Zn(N₃)₂, Zn(N₃)₂·2.5H₂O, and Zn(OH)N₃.
Keywords:
azideshydroxidenitrogenpolymorphismzinc

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Main Results:

  • Successful preparation and characterization of pure, solvent-free zinc azide (Zn(N₃)₂).
  • First-time achievement of single-crystal structure determination for α-Zn(N₃)₂ and two metastable polymorphs.
  • Significant discrepancies found between new data and previously reported values for zinc azide compounds.

Conclusions:

  • The comprehensive structural and characterization data necessitate a revision of earlier studies on zinc azide.
  • This work provides a reliable foundation for future research on zinc azide materials.