Theoretical studies on a series of 1,2,4-triazoles derivatives as potential high energy density compounds

Abstract

Density functional theory calculations at B3LYP/6-31G** and B3P86/6-31G** levels were performed to predict the densities (ρ), detonation velocities (D), pressures (P) and the thermal stabilities for a series of 1,2,4-triazole derivatives for looking high energy density compounds (HEDCs). The heats of formation (HOFs) are also calculated via designed isodesmic reactions. The calculations on the bond dissociation energies (BDEs) indicate that the position of the subsitutent group has great effect on the BDE and the BDEs of the initial scission step are between 31 and 65 kcal/mol. In addition, the condensed phase heats of formation are also calculated for the title compounds. These results would provide basic information for further studies of HEDCs. Densities, detonation velocities and pressures for a series of 1,2,4-triazole derivatives, as well as their thermal stabilities, were investigated to look for high energy density compounds (HEDCs). Heats of formation (HOFs) were also calculated via designed isodesmic reactions. 5,5′-Dinitro-3,3′-bi-1,2,4-triazole, 3-nitro-1-picryl-1,2,4-triazole and 4-(2,4-dinitrobenzyl)-3,5-dinitro-1,2,4-triazole satisfy the quantitative standard of HEDC.