4.7 Article

Correlation between the bond dissociation energies and impact sensitivities in nitramine and polynitro benzoate molecules with polynitro alkyl groupings

Journal

JOURNAL OF HAZARDOUS MATERIALS
Volume 150, Issue 2, Pages 317-321

Publisher

ELSEVIER
DOI: 10.1016/j.jhazmat.2007.04.105

Keywords

density functional theory; bond dissociation energy (BDE); nitro alkyl; impact sensitivity; explosives

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The geometries of nine CHNO nitro-contained explosive molecules were fully optimized employing the B3LYP method of density functional theory with the 6-31G* basis set. The bond dissociation energy (BDE) for removal of the NO2 group in nitroamine molecules with nitro alkyl, and benzoate with nitro alkyl were calculated at the same level. The calculational results of B3LYP/6-31G* and B3P86/6-311G* levels showed that the strength of C-NO2 is weaker than that of N-NO2 bond in nitroamine molecules with nitro alkyl. The weakest bond is the C-NO, in these computed molecules. The relationship between the impact sensitivities and the weakest C-NO2 bond dissociation energy values was examined. The results indicate a nearly linear correlation between the impact sensitivity and the ratio of the BDE value to the molecular total energy. (c) 2007 Published by Elsevier B.V.

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