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• W3094065279 abstract "Abstract In this paper, twelve 1,3-dinitrohexahydropyrimidine-based energetic compounds were designed by introducing various explosopheres into hexahydropyrimidine skeleton. Their geometric and electronic structures, heats of formation (HOFs), energetic performance, thermal stability and impact sensitivity were discussed. It is found that the incorporation of electron-withdrawing groups (–NO 2 , –NHNO 2 , –N 3 , –CH(NO 2 ) 2 , –CF(NO 2 ) 2 , –C(NO 2 ) 3 ) improves HOFs of the derivatives and all the substituents contribute to enhancing the densities and detonation properties ( D , P ) of the title compounds. Therein, the substitution of –C(NO 2 ) 3 features the best energetic performance with detonation velocity of 9.40 km s −1 and detonation pressure of 40.20 GPa. An analysis of the bond dissociation energies suggests that N–NO 2 bond may be the initial site in the thermal decompositions for most of the derivatives. Besides, –ONO 2 and –NF 2 derivatives stand out with lower impact sensitivity. Characters with striking detonation properties ( D = 8.62 km s −1 , P = 35.08 GPa; D = 8.81 km s −1 , P = 34.88 GPa), good thermal stability, and acceptable impact sensitivity (characteristic height H 50 over 34 cm) lead novel compounds 5,5-difluoramine-1,3-dinitrohexahydropyrimidine (K) and 5-fluoro-1,3,5-trinitrohexahydropyrimidine (L) to be very promising energetic materials. This work provides the theoretical molecular design and a reasonable synthetic route of L for further experimental synthesis and testing." @default.
• W3094065279 created "2020-10-29" @default.
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• W3094065279 date "2020-10-26" @default.
• W3094065279 modified "2023-10-18" @default.
• W3094065279 title "Screening for energetic compounds based on 1,3-dinitrohexahydropyrimidine skeleton and 5-various explosopheres: molecular design and computational study" @default.
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• W3094065279 doi "https://doi.org/10.1038/s41598-020-75281-5" @default.
• W3094065279 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/7589465" @default.
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