Abstract:The geometrical structures, front orbit energy and enthalpies of formation(ΔHf) of thirty kinds of 1, 2, 4, 5-tetrazine derivatives were studied by using DFT-wB97/6-31+G** method. On this basis, the detonation parameters of the derivatives were estimated by Kamlet-Jacobs equation. The bond dissociation energy of the title compounds was analyzed. The thermodynamic properties of part of the title compounds at different temperatures from 200 K to 800 K were calculated by statistical thermodynamics. The detonation performances and stability of 1, 2, 4, 5-tetrazine derivatives were compared. Results show that their ΔHf are between 920.46 and 2610.45 kJ·mol-1and the detonation velocities are between 7.69 and 9.31 km·s-1. —NO2 and —N=N— is not conducive to increase the stability of the derivatives. The values of standard molar heat capacity cp、standard molar entropy Sm and standard molar enthalpy Hm gradually increase with the temperature. i2 (3-(5-Nitro-1, 2, 3, 4-tetrazol)-6-nitro-1, 2, 4, 5-tetrazine), ii2 (3-(azo-5-nitro-1, 2, 3, 4-tetrazol)-6-nitro-1, 2, 4, 5-tetrazine) and iv2 (3, 6-azo-bis(5-nitro-1, 2, 3, 4-tetrazol)-1, 2, 4, 5-tetrazine) may be considered as potential candidates for energetic materials.