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How aromatic system size affects the sensitivities of highly energetic molecules?

Positive values of electrostatic potentials above the central regions of the molecular surface are strongly related to the high sensitivities of highly energetic molecules. The influence of aromatic system size on the positive values of electrostatic potentials and bond dissociation energies of C–NO...

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Autores principales: Veljković, Ivana S., Radovanović, Jelena I., Veljković, Dušan Ž.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: The Royal Society of Chemistry 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9041559/
https://www.ncbi.nlm.nih.gov/pubmed/35495524
http://dx.doi.org/10.1039/d1ra06482g
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author Veljković, Ivana S.
Radovanović, Jelena I.
Veljković, Dušan Ž.
author_facet Veljković, Ivana S.
Radovanović, Jelena I.
Veljković, Dušan Ž.
author_sort Veljković, Ivana S.
collection PubMed
description Positive values of electrostatic potentials above the central regions of the molecular surface are strongly related to the high sensitivities of highly energetic molecules. The influence of aromatic system size on the positive values of electrostatic potentials and bond dissociation energies of C–NO(2) bonds was studied by Density Functional Theory (DFT) calculations on a series of polycyclic nitroaromatic molecules. Calculations performed at PBE/6-311G** level showed that with the increase of the aromatic system size, values of positive electrostatic potential above the central areas of selected energetic molecules decrease from 32.78 kcal mol(−1) (1,2,4,5-tetranitrobenzene) to 15.28 kcal mol(−1) (2,3,9,10-tetranitropentacene) leading to the decrease in the sensitivities of these molecules towards detonation. Results of the analysis of electrostatic potential maps were in agreement with the trends in bond dissociation energies calculated for C–NO(2) bonds of studied nitroaromatic molecules. Bond dissociation energies values indicate that the C–NO(2) bond in the molecule of 1,2,4,5-tetranitrobenzene (56.72 kcal mol(−1)) is weaker compared to the nitroaromatic molecules with the additional condensed aromatic rings and with a similar arrangement of –NO(2) groups (59.75 kcal mol(−1) in the case of 2,3,9,10-tetranitropentacene). The influence of the mutual arrangement of –NO(2) groups on the sensitivity of nitroaromatic molecules was also analyzed. Results obtained within this study could be of great importance for the development of new classes of highly energetic molecules with lower sensitivity towards detonation.
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spelling pubmed-90415592022-04-28 How aromatic system size affects the sensitivities of highly energetic molecules? Veljković, Ivana S. Radovanović, Jelena I. Veljković, Dušan Ž. RSC Adv Chemistry Positive values of electrostatic potentials above the central regions of the molecular surface are strongly related to the high sensitivities of highly energetic molecules. The influence of aromatic system size on the positive values of electrostatic potentials and bond dissociation energies of C–NO(2) bonds was studied by Density Functional Theory (DFT) calculations on a series of polycyclic nitroaromatic molecules. Calculations performed at PBE/6-311G** level showed that with the increase of the aromatic system size, values of positive electrostatic potential above the central areas of selected energetic molecules decrease from 32.78 kcal mol(−1) (1,2,4,5-tetranitrobenzene) to 15.28 kcal mol(−1) (2,3,9,10-tetranitropentacene) leading to the decrease in the sensitivities of these molecules towards detonation. Results of the analysis of electrostatic potential maps were in agreement with the trends in bond dissociation energies calculated for C–NO(2) bonds of studied nitroaromatic molecules. Bond dissociation energies values indicate that the C–NO(2) bond in the molecule of 1,2,4,5-tetranitrobenzene (56.72 kcal mol(−1)) is weaker compared to the nitroaromatic molecules with the additional condensed aromatic rings and with a similar arrangement of –NO(2) groups (59.75 kcal mol(−1) in the case of 2,3,9,10-tetranitropentacene). The influence of the mutual arrangement of –NO(2) groups on the sensitivity of nitroaromatic molecules was also analyzed. Results obtained within this study could be of great importance for the development of new classes of highly energetic molecules with lower sensitivity towards detonation. The Royal Society of Chemistry 2021-09-30 /pmc/articles/PMC9041559/ /pubmed/35495524 http://dx.doi.org/10.1039/d1ra06482g Text en This journal is © The Royal Society of Chemistry https://creativecommons.org/licenses/by/3.0/
spellingShingle Chemistry
Veljković, Ivana S.
Radovanović, Jelena I.
Veljković, Dušan Ž.
How aromatic system size affects the sensitivities of highly energetic molecules?
title How aromatic system size affects the sensitivities of highly energetic molecules?
title_full How aromatic system size affects the sensitivities of highly energetic molecules?
title_fullStr How aromatic system size affects the sensitivities of highly energetic molecules?
title_full_unstemmed How aromatic system size affects the sensitivities of highly energetic molecules?
title_short How aromatic system size affects the sensitivities of highly energetic molecules?
title_sort how aromatic system size affects the sensitivities of highly energetic molecules?
topic Chemistry
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9041559/
https://www.ncbi.nlm.nih.gov/pubmed/35495524
http://dx.doi.org/10.1039/d1ra06482g
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