Synthesis and Properties of Dinitrourea (DNU) and its Salts

Syczewski, M.; Cieślowska-Glińska, I.; Boniuk, H.

doi:10.1002/(sici)1521-4087(199806)23:3<155::aid-prep155>3.0.co;2-h

Cited by 15 publications

(11 citation statements)

References 3 publications

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“…For the dinitrourea synthesis, Goede et al [10] used 95 % sulfuric acid and 100 % nitric acid. In all other respects, the urea nitration stage did not differ from the methods described above [1,2].…”

Section: Synthesis Methodsmentioning

confidence: 75%

“…At room temperature, in the presence of trace amounts of water and acids, dinitrourea undergoes degradation. Therefore, the synthesized compound was identified via its stable diammonium salt by elemental analysis and the IR spectrum [1]. Thermograms for the diammonium, dipotassium, and hexamethyleneamine salts are also given.…”

Section: Synthesis Methodsmentioning

confidence: 99%

“…When the urea nitration mixture comprising of nitric acid mixed with sulfuric acid or oleum is cooled to À15 8C, the dinitrourea II precipitates from the mixture and may be collected [1,2,6]. The resultant dinitrourea II comprises up to 40 % of sulfuric acid.…”

Section: Isolation Methodsmentioning

confidence: 99%

“…Dinitrourea II is quite a strong dibasic acid capable of detaching protons in a stepwise manner to form acid salts and normal salts [13]. M = K (II-K, II-2K), Na (II-Na, II-2Na), Cs (II-Cs, II-2Cs), NH 4 (II-NH 4 , II-2NH 4 [1]).…”

Section: Reaction With Alkalis and Basesmentioning

confidence: 99%

“…Information on the synthesis and properties of 1,3-dinitrourea, despite the simplicity of its structural formula, emerged virtually simultaneously in diverse literature sources at the turn of the 20th [1] to the 21st century [2]. Studies on the urea nitration with different nitrating agents to produce nitro compounds were previously reported in sufficient detail [3].…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Synthesis, Structure, and Properties ofN,N′‐Dinitrourea

Il’yasov

Сакович

Lobanova

2013

Propellants Explo Pyrotec

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Section: Synthesis Methodsmentioning

confidence: 75%

Section: Synthesis Methodsmentioning

confidence: 99%

Section: Isolation Methodsmentioning

confidence: 99%

Section: Reaction With Alkalis and Basesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Synthesis, Structure, and Properties ofN,N′‐Dinitrourea

Il’yasov

Сакович

Lobanova

2013

Propellants Explo Pyrotec

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A Study on the Condensation of Nitramide (NH2NO2) with Formaldehyde and the Characteristics of the Products Formed

Raszewski

Syczewski

1999

Propellants Explos. Pyrotech

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Eine Studie u È ber die Kondensation von Nitramid (NH 2 NO 2 ) mit Formaldehyd und Charakterisierung der entstehenden Produkte Versuche zur Synthese von aliphatischen Polymethylennitroaminen durch die Reaktion zwischen NH 2 NO 2 und Formaldehyd wurden unternommen. Der Syntheseprozeû wurde ausgefu Èhrt in einem Zweikomponentensystem WasseraEthylacetat. Die Lo Èslichkeit des erhaltenen Produkts und seine Zersetzungsemp®ndlichkeit in verschiedenen Lo Èsungsmitteln wurde untersucht. Die Wa Èrmefestigkeit und die Temperatur der Selbstzersetzung wurde bestimmt mittels DTA-TG. Trotz ihrer Eigenschaft als energetisches Material zeigt die Verbindung geringe Emp®ndlichkeit gegen machanische Ein¯u Èsse (Reibung). E Â tude de la condensation du nitramide (NH 2 NO 2 ) avec le formalde Âhyde et caracte Ârisation des produits forme Âs On a entrepris des essais de synthe Áse de polyme Âthyle Ánenitroamines aliphatiques par re Âaction entre NH 2 NO 2 et du formalde Âhyde. Le processus de synthe Áse s'est de Âroule Â dans un syste Áme a Á deux composants eauaester ace Âtique. On a e Âtudie Â la solubilite Â du produit obtenu et sa sensibilite Â de de Âcomposition dans diffe Ârents solvants. La re Âsistance a Á la chaleur et la tempe Ârature de de Âcomposition spontane Âe ont e Âte Â de Âtermine Âes par DTA-TG. Malgre Â ses proprie Âte Âs de mate Âriau e Ânerge Âtique, le compose Â n'est que tre Ás peu sensible aux in¯uences me Âcaniques (frottement). SummaryAttempts have been made to synthesize aliphatic polymethylene nitroamines through reactions between NH 2 NO 2 and CH 2 O. The process of synthesis has been achieved in a two-component system: wateraethyl acetate. The solubility of the obtained product, as well as, its susceptibility to chemical decomposition in different solvents have been studied The product's heat resistance and its temperature of selfdecomposition have been determined through the DTA-TG method Despite being an energetic material, it shows little sensitiveness to mechanical stimuli (friction).

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Syntheses and Analyses of N,N′‐Dinitrourea

Goede

Wingborg

Bergman

et al. 2001

Propellants, Explosives, Pyrotechnics

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N,N′‐Dinitrourea was prepared through nitration of urea at low temperature in mixed acids in 67 % yield. The prepared material was pure and found to be stable at room temperature. The properties of N,N′‐dinitrourea were analysed by: TG, DSC, ignition test in Wood's metal bath, NMR, MS, FT‐IR, gaspycnometry and BAM impact and friction sensitivity tests. N,N′‐Dinitrourea was found to have a very high density and positive oxygene balance. It was, however, found to be sensitive both to impact and friction.

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Synthesis and Properties of Dinitrourea (DNU) and its Salts

Cited by 15 publications

References 3 publications

Synthesis, Structure, and Properties ofN,N′‐Dinitrourea

Synthesis, Structure, and Properties ofN,N′‐Dinitrourea

A Study on the Condensation of Nitramide (NH2NO2) with Formaldehyde and the Characteristics of the Products Formed

Syntheses and Analyses of N,N′‐Dinitrourea

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