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N-nitroso- and N-nitraminotetrazoles
Konstantin Karaghiosoff1, Thomas M Klapötke, Peter Mayer
1Department of Chemistry and Biochemistry, Ludwig-Maximilian University Munich, Butenandtstrasse 5-13 (Haus D), 81377 Munich, Germany.
The Journal of Organic Chemistry
|February 14, 2006
Summary
New N-nitroso and N-nitraminotetrazoles were synthesized and characterized. These compounds exhibit high detonation velocities, comparable to TNT and nitroglycerin, indicating potential energetic material applications.
Area of Science:
- Organic Chemistry
- Materials Science
- Energetic Materials
Background:
- Tetrazole derivatives are of interest due to their unique properties and potential applications.
- Synthesis and characterization of novel nitrogen-rich heterocyclic compounds are crucial for advancing energetic materials research.
Purpose of the Study:
- To synthesize and fully characterize novel N-nitrosoaminotetrazoles and N-nitraminotetrazoles.
- To investigate the molecular structures, bonding, and energetic properties of these newly synthesized compounds.
Main Methods:
- Synthesis via direct nitration or dehydration of aminotetrazoles and conversion of N-nitrosoaminotetrazoles.
- Characterization using vibrational (IR, Raman) and multinuclear NMR spectroscopy (14N/15N, 1H, 13C), mass spectrometry, and elemental analysis.
- Structural determination via single-crystal X-ray diffraction and theoretical calculations (B3LYP/6-31G(d,p), NBO analysis).
Main Results:
- Successful synthesis of N-nitroso- (5a,c) and N-nitraminotetrazoles (6a-c) with high yields.
- Comprehensive characterization confirming structures and bonding, including detailed analysis of spectroscopic data and N,N rotational barriers.
- Evaluation of physicochemical properties for N-nitraminotetrazoles (6a,c) revealed positive heats of formation and high detonation velocities (5988-7181 m s-1).
Conclusions:
- The synthesized N-nitroso and N-nitraminotetrazoles are well-characterized novel compounds.
- Calculated detonation velocities suggest these compounds possess significant potential as energetic materials, comparable to established explosives like TNT and nitroglycerin.