Computational assessment of several hydrogen-free high energy compounds

Tetrazino-tetrazine-tetraoxide (TTTO) is an attractive high energy compound, but unfortunately, it is not yet experimentally synthesized so far. Isomerization of TTTO leads to its five isomers, bond-separation energies were empolyed to compare the global stability of six compounds, it is found that isomer 1 has the highest bond-separation energy (1204.6 kJ/mol), compared with TTTO (1151.2 kJ/mol); thermodynamic properties of six compounds were theoretically calculated, including standard formation enthalpies (solid and gaseous), standard fusion enthalpies, standard vaporation enthalpies, standard sublimation enthalpies, lattice energies and normal melting points, normal boiling points; their detonation performances were also computed, including detonation heat (Q, cal/g), detonation velocity (D, km/s), detonation pressure (P, GPa) and impact sensitivity (No, cm), compared with TTTO (Q=1311.01 J/g, D = 9.228 km/s, P=40.556 GPa, h(50) = 12.7 cm), isomer 5 exhibites better detonation performances (Q=1523.74 J/g, D=9.389 km/s, P=41.329 GPa, h(50) = 28.4 cm). (C) 2015 Elsevier Inc. All rights reserved.