Category: 1821-27-8

Csaszar, J. published the artcileOn the spectra of some acceptor-type polynitro derivatives of biphenyl, biphenylmethane and biphenylamine, COA of Formula: C12H9N3O4, the publication is Acta Physica et Chemica (1987), 33(1-4), 11-21, database is CAplus.

The UV and visible spectra of nitro and polynitro derivatives of diphenylamine were investigated and the substituent effects were interpreted in comparison with the corresponding biphenyl and diphenylmethane derivatives

Acta Physica et Chemica published new progress about 1821-27-8. 1821-27-8 belongs to catalysis-chemistry, auxiliary class Nitro Compound,Amine,Benzene, name is Bis(4-nitrophenyl)amine, and the molecular formula is C12H9N3O4, COA of Formula: C12H9N3O4.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Curtis, Neville J. published the artcileIsomer distribution of nitro derivatives of diphenylamine in gun propellants: nitrosamine chemistry, COA of Formula: C12H9N3O4, the publication is Propellants, Explosives, Pyrotechnics (1990), 15(5), 222-30, database is CAplus.

The derivatization of diphenylamine in single-base gun propellants was studied as a function of aging at 80¡ã. The relative proportions of 2-nitrodiphenylamine (I) and 4-nitrodiphenylamine (II) varied from 32:68 to 63:37, according to propellant type. Preferences for para substitution were seen in exptl. lots stabilized with I, II, and N-nitrosodiphenylamine. Increasing water content resulted in higher preferences for ortho substitution. II is a better stabilizer than I. Model studies with nitro-substituted N-nitrosamines show that para substitution is preferred in boiling AcOH. Mechanisms for the conversion of N-nitrosamines into isomeric nitro derivatives are discussed in relation to the model studies and the behavior in propellants. Procedures are given for the preparation of N-nitrosamines.

Propellants, Explosives, Pyrotechnics published new progress about 1821-27-8. 1821-27-8 belongs to catalysis-chemistry, auxiliary class Nitro Compound,Amine,Benzene, name is Bis(4-nitrophenyl)amine, and the molecular formula is C12H9N3O4, COA of Formula: C12H9N3O4.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Del Campo, Pilar published the artcileThin-layer chromatographic stability determination of powder containing diphenylamine as a stabilizer, COA of Formula: C12H9N3O4, the publication is Ion (Madrid) (1975), 35(410), 633-41, database is CAplus.

Thin-layer chromatog. (TLC) provides high reliability in determining the remaining life of a propellant at a given time. By means of a “stabilogram” and with only 1 TLC plate, it is possible to visualize the actual state of the propellant and its resistance to forced aging. 13 Different kinds of propellant, double or single base, were subjected to different aging temperatures and time intervals and examined by traditional (Me violet paper) and TLC methods. The more accurate TLC method is carried out on silica gel G precoated plates and eluted with C6H6. Visualization is by alc. NaOH or by the Mouraour reagent, or without reagents. Colors and Rf of the different dinitro- and trinitro- derivatives of diphenylamine are given.

Ion (Madrid) published new progress about 1821-27-8. 1821-27-8 belongs to catalysis-chemistry, auxiliary class Nitro Compound,Amine,Benzene, name is Bis(4-nitrophenyl)amine, and the molecular formula is C12H9N3O4, COA of Formula: C12H9N3O4.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Evendijk, J. E. published the artcileSeparation and identification of explosive powder with two-dimensional thin-layer chromatography, Product Details of C12H9N3O4, the publication is Explosivstoffe (1968), 16(7), 152-4, database is CAplus.

Up to 18 components encountered in explosive powder mixtures can be completely separated and easily identified by thin-layer chromatog. by using 0.3-mm. SiO2 gel HF254 layers on glass plates. From 20 to 230 mg. of a powder mixture is extracted with CH2Cl2 and applied to glass plates by using as a pouring solution a 20:23 mixture of PhCl and ClCH2CH2Cl.

Explosivstoffe published new progress about 1821-27-8. 1821-27-8 belongs to catalysis-chemistry, auxiliary class Nitro Compound,Amine,Benzene, name is Bis(4-nitrophenyl)amine, and the molecular formula is C12H9N3O4, Product Details of C12H9N3O4.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Frey, Max published the artcileRecent methods in the investigation of propellants, Application of Bis(4-nitrophenyl)amine, the publication is Explosivstoffe (1964), 12(7), 149-57, database is CAplus.

Propellants contain gelatinized nitrocellulose (I) as the main energy producer in single-base powders, while double-base powders contain nitroglycerin (II) as a further energy producer that also aids gelatinization of the I. DNT and TNT have some gelatinizing properties and are contained in some kinds of powders as desensitizers. I and II give off nitrous gases on slow decomposition and stabilizing agents, such as Ph₂NH, centralite, and 2-nitrodiphenylamine, which take up the nitrous gases, are included. The stabilizers become converted into nitroso and nitro compounds Colorimetry shows that, after storage, a powder stabilized with Ph₂NH contains N-nitrosodiphenylamine, and mono-, di-, and trinitrodiphenylamines. Polarography was used for the analysis of propellants. Extraction of the propellant with CH₂Cl ₂and evaporation of the solvent gave a residue that was dissolved in MeOH. By polarography in an NH₄OH/aqueous NH₄Cl/MeOH buffer solution, the II and DNT/TNT could be estimated By first reducing the II with FeSO₄, the nitro compounds derived from the diphenylamine stabilizers could be polarographically estimated by first hydrogenating all nitro compounds with a H/Pd catalyst, followed by polarography in tetramethylammonium bromide solution (reduction potential 2.6 v.), the dialkyl phthalates used as plasticizers could be estimated For example, 2 g. propellant was exstd. in a Soxhlet apparatus for 48 hrs. with CH₂Cl₂. The solvent is evaporated at 40¡ã and the residue is dissolved in MeOH and made up to 100 ml. To a 100-ml. flask, is added MeOH 5, EtOH 5, basic buffer solution (NH₃₄Cl 5.3, 25% NH₄OH 6.8, H₂O 500, MeOH 500 g.), and fresh 0.2% gelatin solution 5 ml., and the solution made up to 100 ml. with more of the basic buffer solution This solution is polarographed. A further 5 ml. of the MeOH solution of the propellant extract is mixed with 5 ml. of a standard solution of the component to be determined, e.g. 1% II in EtOH, and made up to 100 ml. with the basic buffer solution and 5 ml. of the gelatin solution It is then polarographed. If the limiting current in the first case is i₁ and in the second case i₂, the % II is i₁/(i₂ – i₁).

Explosivstoffe published new progress about 1821-27-8. 1821-27-8 belongs to catalysis-chemistry, auxiliary class Nitro Compound,Amine,Benzene, name is Bis(4-nitrophenyl)amine, and the molecular formula is C12H9N3O4, Application of Bis(4-nitrophenyl)amine.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Alm, Anita published the artcileMass spectra of diphenylamine compounds with nitro and nitroso substituents and of tetraphenylhydrazine, Related Products of catalysis-chemistry, the publication is Explosivstoffe (1969), 17(7), 156-64, database is CAplus.

During the decomposition of nitrocellulose in propellants, the oxides of N formed converted the stabilizer, Ph2NH, into a number of nitro and nitroso compounds, the nature and amounts of which are important in surveillance of the condition of the explosive. To assist in identification of the compounds of interest, the mass spectra of Ph2NH and 10 of its nitroso and nitro derivatives and that of N2Ph4 were determined and the spectra discussed with reference to characteristic peaks. The min. amounts required are important from a safety standpoint. A combination of thin-layer chromatog. and mass spectrometry in the anal. of mixtures in mg and ¦Ìg amounts is feasible.

Explosivstoffe published new progress about 1821-27-8. 1821-27-8 belongs to catalysis-chemistry, auxiliary class Nitro Compound,Amine,Benzene, name is Bis(4-nitrophenyl)amine, and the molecular formula is C12H9N3O4, Related Products of catalysis-chemistry.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Ammann, R. published the artcileIs there a critical composition of reaction products of diphenylamine stabilized nitrocellulose propellants during aging?, SDS of cas: 1821-27-8, the publication is Symposium on Chemical Problems Connected with the Stability of Explosives, [Proceedings] (1977), 9-27, database is CAplus.

Storage of nitrocellulose [9004-70-0] propellants (I) at 90¡ã with a simultaneous tracking of weight loss is described. This method leads to autocatalytic decomposition of the propellants within 1 to 2 months and allows for very sensitive differentiation between different degrees of aging. A quant. thin-layer chromatog. method is also described to determine all the nitro derivatives of the Ph2NH (DPA) [122-39-4] stabilizer, including the tetra- and N-nitroso derivatives The hypothesis that the propellants form a generally very similar critical composition of DPA reaction products was supported, that is, they begin to decompose as soon as the dinitro compounds are exhausted and the trinitro derivatives have almost completed their reaction to the higher-nitrated ones, mainly tetranitro-DPA [1330-01-4].

Symposium on Chemical Problems Connected with the Stability of Explosives, [Proceedings] published new progress about 1821-27-8. 1821-27-8 belongs to catalysis-chemistry, auxiliary class Nitro Compound,Amine,Benzene, name is Bis(4-nitrophenyl)amine, and the molecular formula is C12H9N3O4, SDS of cas: 1821-27-8.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Bellerby, J. M. published the artcileReactions of 2- and 4-nitrodiphenylamine and their combination in single-base propellants: evidence for an interaction between stabilizers at 80¡ãC, COA of Formula: C12H9N3O4, the publication is Journal of Energetic Materials (1997), 15(1), 1-19, database is CAplus.

Reverse-phase HPLC was used to determine concentration profiles for the stabilizers and derivatives in three exptl. single-base propellants stabilized by 1% 2-nitrodiphenylamine (2NDPA), 1% 4-nitrodiphenylamine (4NDPA), and 0.5% 2NDPA/0.5% 4NDPA during aging at 80¡ã over 28 days. In the single-stabilizer compositions 2NDPA was converted mainly into 2,2′- and 2,4′-dinitrodiphenylamine; 4NDPA initially gives N-nitroso-4-nitrodiphenylamine (NO-4NDPA). The same derivatives, but with different concentration profiles, were observed in the dual-stabilizer propellant. It was concluded that the differences result from the interaction of N-nitroso-2-diphenylamine (NO-2NDPA) and 2NDPA with nitrogen oxides arising from NO-4NDPA dissociation There was evidence that dinitrodiphenylamines derived from 2NDPA are formed by rearrangement of N,2-dinitrodiphenylamine, whereas those derived from 4NDPA are generated in reactions which follow NO-4NDPA dissociation

Journal of Energetic Materials published new progress about 1821-27-8. 1821-27-8 belongs to catalysis-chemistry, auxiliary class Nitro Compound,Amine,Benzene, name is Bis(4-nitrophenyl)amine, and the molecular formula is C12H9N3O4, COA of Formula: C12H9N3O4.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Bohn, M. A. published the artcileKinetic modelling of the concentrations of the stabilizer DPA and some of its consecutive products as function of time and temperature, Recommanded Product: Bis(4-nitrophenyl)amine, the publication is Journal of Thermal Analysis and Calorimetry (2001), 65(1), 103-120, database is CAplus.

By kinetic modeling of the possible reactions of diphenylamine (DPA) and its nitrated consecutive products used to stabilize cellulose nitrate (CN), one can get reactivities for the nitrated DPA compounds for the situation inside a real CN formulation and therewith determine their stabilizing contribution. Concentration data of DPA and seven of its consecutive products have been determined by HPLC from isothermal ageing of a CN formulation at temperatures between 65 and 90 ¡ãC for up to 344 days. A comparison between the modeling presented and modelings published in the literature using the steady-state approximation is made. The steady-state approximation oversimplifies the stabilizer reaction behavior in a CN formulation. From the applied modeling the question about N-nitrosodiphenylamine as a key intermediate can be answered.

Journal of Thermal Analysis and Calorimetry published new progress about 1821-27-8. 1821-27-8 belongs to catalysis-chemistry, auxiliary class Nitro Compound,Amine,Benzene, name is Bis(4-nitrophenyl)amine, and the molecular formula is C12H9N3O4, Recommanded Product: Bis(4-nitrophenyl)amine.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Zhou, Fabin published the artcileA terphenyl phosphine as a highly efficient ligand for palladium-catalysed amination of aryl halides with 1¡ã anilines, COA of Formula: C12H9N3O4, the publication is Journal of Catalysis (2021), 238-243, database is CAplus.

A terphenyl phosphine ligand (2,6-bis(2,4,6-triisopropylphenyl)phenyl-dicyclohexylphosphine, TXPhos) and its supported palladium complex [(TXPhos)(allyl)PdCl] have been developed and the catalyst system is highly efficient in amination of aryl halides ArX (Ar = Ph, 2-methoxyphenyl, 4-cyanophenyl, etc.; X = Cl, Br, I) with 1¡ã anilines RNH₂ (R = Ph, 2-nitrophenyl, 2,5-dimethylphenyl, etc.), especially effective for densely functionalized substrates including both partners possessing ortho-ester, acetyl, nitrile and nitro groups. With the TXPhos-supported catalyst system, many partner combinations have been unprecedentedly realized and the base scope has been even extended to KOAc, which is even the best choice in the amination of 2-nitrochlorobenzene.

Journal of Catalysis published new progress about 1821-27-8. 1821-27-8 belongs to catalysis-chemistry, auxiliary class Nitro Compound,Amine,Benzene, name is Bis(4-nitrophenyl)amine, and the molecular formula is C14H10O4, COA of Formula: C12H9N3O4.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia