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Related Experiment Videos

3-Nitro-1-nitromethyl-1H-1,2,4-triazole

Vasiliev1, Astachov, Golubtsova

  • 1Krasnoyarsk State University, Institute of Physics, Krasnoyarsk 660036, Russia. adva@iph.krasnoyarsk.su.

Acta Crystallographica. Section C, Crystal Structure Communications
|August 16, 2000
PubMed
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This study reveals the molecular structure of C(3)H(3)N(5)O(4), identifying the initial thermal decomposition step as H(2)C-NO(2) bond breakage. Conformational analysis highlights key differences from prior computational predictions.

Area of Science:

  • Crystallography and Molecular Structure
  • Chemical Kinetics and Thermodynamics
  • Computational Chemistry

Background:

  • The compound C(3)H(3)N(5)O(4) possesses a complex structure with potential energetic properties.
  • Understanding the thermal stability and decomposition pathways of energetic materials is crucial for safety and application.
  • Previous computational studies may not fully capture the molecule's conformational behavior.

Purpose of the Study:

  • To elucidate the detailed molecular conformation of C(3)H(3)N(5)O(4).
  • To identify the primary step in the thermal decomposition mechanism.
  • To compare experimental conformational data with semi-empirical calculation results.

Main Methods:

  • X-ray crystallography for determining the solid-state structure.

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  • Molecular conformation analysis to understand spatial arrangement of fragments.
  • Thermal analysis techniques to study decomposition initiation.

    • Main Results:

    • The molecule comprises three twisted planar fragments: a triazole ring, a nitromethylene group, and a nitro group.
    • The initial stage of thermal decomposition involves the cleavage of the H(2)C-NO(2) bond.
    • Significant discrepancies were observed between the experimentally determined molecular conformation and results from semi-empirical calculations.

    Conclusions:

    • The molecular structure and conformation of C(3)H(3)N(5)O(4) are characterized.
    • The H(2)C-NO(2) bond is identified as the weakest link, initiating thermal decomposition.
    • Experimental conformational data suggests limitations in current semi-empirical modeling for this compound.