Abstract
Molecular orbital calculations at the DFT-B3LYP/aug-cc-pVDZ level are performed for the possible tautomers of 1-nitroso-1,2,4-triazol-5-one-2-oxide. We have examined the substitution effects of carbonyl, N-oxide, and nitroso groups by comparing the calculated geometries, relative energies, and electrostatic potentials of model molecules. The optimized structures, vibrational frequencies, and thermodynamic values for triazolone-N-oxides are obtained in the ground state. The results show that 1H, 4H tautomers are most stable. Detonation velocity and detonation pressure are evaluated by the Kamlet-Jacob equations based on the predicted density and the calculated heat of explosion. The explosive properties of the designed compounds seem to be promising compared with those of 1,3,5-trinitroperhydro-1,3,5-triazine (D 8.75 km/s, P 34.70 GPa), octahydro-1,3,5,7-tetrnitro-1,3,5,7-tetrazocine (D 9.10 km/s, P 39.3 GPa), and 2,4,6,8,10,12-hexanitro-2,4,6,8,10,12-hexaazaisowurtzitane (D 9.20 km/s, P 42.0 GPa).
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Original Russian Text © 2014 P. Ravi, S. P. Tewari.
The text was submitted by the authors in English. Zhurnal Strukturnoi Khimii, Vol. 55, No. 2, pp. 268–275, March–April, 2014.
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Ravi, P., Tewari, S.P. Structures and energies of the tautomers of 1-nitroso-1,2,4-triazol-5-one-2-oxide: New triazol-5-one-n-oxides. J Struct Chem 55, 248–255 (2014). https://doi.org/10.1134/S0022476614020085
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DOI: https://doi.org/10.1134/S0022476614020085