- Derivatives of 5-nitro-1,2,3-2H-triazole-high performance energetic materials
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The energetic derivatives of 5-nitro-1,2,3-2H-triazole, which include 2-(methyl or amino)-4-(nitramino, azido, or nitro)-5-nitro-1,2,3-2H-triazoles, were prepared in moderate yields, and confirmed with NMR and IR spectroscopy, and elemental analysis. Their key properties, viz., melting and decomposition temperatures, densities, detonation pressures and velocities, and impact sensitivities, were measured or calculated. Among the new derivatives, 2-amino-4,5-dinitro-1,2,3-2H-triazole exhibits properties (Tm, 94 °C; Td, 190 °C; ρ, 1.83 g cm-3; P, 36.2 Gpa, vD, 8843 m s-1, IS, 24 J), comparable with RDX (T m, 205 °C; Td, 230 °C; ρ, 1.80 g cm -3; P, 35.0 Gpa, vD, 8762 m s-1, IS, 7.5 J), and may have potential as a high-performance energetic material.
- Zhang, Yanqiang,Parrish, Damon A.,Shreeve, Jean'Ne M.
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p. 585 - 593
(2013/07/04)
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- Crystal Structures of and
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The title compounds and the trinitro methanide salts with PPh4(+) and N-methyl pyridinium cations are prepared from K and the chlorides of the organic cations in aqueous solution.They form thermally stable, yellow crystalline solids.The IR spectra are reported.The crystal structures of (2) and (3) are determined by the aid of X-ray methods. 2: space group P21/c, Z = 4; a = 825, b = 1404, c = 1771 pm; β = 97.4 deg; 1891 independent observed reflexions, R = 0.063. 3: space group P21/c, Z = 4; a = 848, b = 1364, c = 1869 pm; β = 99.9 deg; 2380 independent observed reflexions, R = 0.036.Both compounds are ionic and consist of (+) and cations, resp., without special features, and trinitro methanide ions.In the anions the carbon atoms are almost coplanar with the N-atoms of the nitro groups with mean C-N bond lengths of 139 pm and mean NCN bond angles of 120 deg, suggesting sp2 hybridisation.In 3 the torsional angles between CN3 plane and the NO2 groups range from 15 deg to 32 deg, whereas in 2 two of the NO2 groups are almost coplanar with the CN3 moiety (dihedral angles 0.3 deg and 8.1 deg) and one nitro group is disordered in two positions (dihedral angles 15.8 deg and 74.7 deg). - Keywords: (Methyl)triphenylphosphonium Trinitromethanide, (Iodomethyl)triphenylphosphonium Trinitromethanide, Preparation, Crystal Structure, IR Spectra
- Scherfise, Klaus Dieter,Weller, Frank,Dehnicke, Kurt
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p. 906 - 912
(2007/10/02)
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