Category: 1821-27-8

Keshavarz, Mohammad Hossein published the artcileAn improved simple method for prediction of entropy of fusion of energetic compounds, Safety of Bis(4-nitrophenyl)amine, the publication is Fluid Phase Equilibria (2013), 52-62, database is CAplus.

A new general method has been introduced for prediction of entropy of fusion of important classes of energetic compounds including polynitro arene, acyclic and cyclic nitramine, nitrate ester and nitroaliph. compounds It extends earlier work, which was restricted to nitroarom. compounds, to estimate entropy of fusions of any compound containing at least one of the groups ArNO₂, CNO₂, CONO₂ or NNO₂ through additive and correcting non-additive functions. The number of nitrogen and oxygen atoms in an energetic compound was used as additive function. For 92 compounds (corresponding to 167 measured values) belong to different types of energetic materials, the root-mean square (rms) deviation of the additive part is 13.5 J/(K mol). The reliability of the new model can be increased by considering one correcting non-additive function for which the value of rms deviation is 10.2 J/(K mol). The predicted outcomes of the new method, by using only additive part or both additive and non-additive functions, give more reliable results as compared to one of the best available methods.

Fluid Phase Equilibria 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, Safety of Bis(4-nitrophenyl)amine.

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

Chang, Kah Haw published the artcileOptimization of Headspace Solid-Phase Microextraction Technique for Extraction of Volatile Smokeless Powder Compounds in Forensic Applications, Synthetic Route of 1821-27-8, the publication is Journal of Forensic Sciences (2014), 59(4), 1100-1108, database is CAplus and MEDLINE.

Smokeless powders are low explosives and are potentially found in cases involving firearms and improvised explosive devices. Apart from inorganic compound anal., forensic determination of organic components of these materials appears as a promising alternative, especially the chromatog. techniques. This work describes the optimization of a solid-phase microextraction technique using an 85 ¦Ìm polyacrylate fiber followed by gas chromatog.-flame ionization detection for smokeless powder. A multivariate exptl. design was performed to optimize extraction-influencing parameters. A 2⁴ factorial first-order design revealed that sample temperature and extraction time were the major influencing parameters. Doehlert matrix design has subsequently selected 66¡ãC and 21 min as the compromised conditions for the two predetermined parameters. This extraction technique has successfully detected the headspace compounds of smokeless powders from different ammunition types and allowed for their differentiation. The novel technique allows more rapid sample preparation for chromatog. detection of smokeless powders.

Journal of Forensic Sciences 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, Synthetic Route of 1821-27-8.

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

Iida, Hirotada published the artcileStudies on the base-catalyzed reaction. VII. The reactions of p-nitroaniline with nitrobenzene derivatives in strongly basic solutions, Synthetic Route of 1821-27-8, the publication is Nippon Kagaku Kaishi (1976), 138-43, database is CAplus.

P-nitroaniline is ionized by Me3COK in (Me2N)3PO to form p-nitrophenylamide ion, which gives rise to nucleophilic substitution with PhNO2 derivatives on the substituent and on the hydrogen atom. The latter, occurring in the ortho or para position to the NO2 group, was recognized in almost every reaction under various conditions. In the former type of the reaction, the meta substituent was not affected, but the ortho or para substituents were favorably displaced. Under such conditions as giving both types of substitution, the former type of substitution was predominant if less Me3COK was used. The latter type of substitution was preferred when more Me3COK was used. The mechanisms of both types of substitution are suggested from the structure of the products and ESR.

Nippon Kagaku Kaishi 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, Synthetic Route of 1821-27-8.

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

Dong, Qizhi published the artcileLigand-free Cu₂O nanowire catalyzing C-N and C-O coupling reaction, Application In Synthesis of 1821-27-8, the publication is Youji Huaxue (2014), 34(1), 147-154, database is CAplus.

A novel nano-material with Cu₂O nanowires loaded on TiO₂ nanotubes (Cu₂O/TiO₂ NTs) was prepared in this paper. The new type of catalyst was used to catalyze the C-N and C-O coupling of chlorinated aromatics The results showed that this catalyst promised the reaction of not only aryl bromide, but also aryl chloride, and most products, e.g., I, were synthesized in good to excellent yields. Moreover, the reused experiments confirmed that the catalyst can be recycled five times and present stable yields for reaction.

Youji Huaxue 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 In Synthesis of 1821-27-8.

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

Heil, Moritz published the artcileCharacterization of Gun Propellants by Long-term Mass Loss Measurements, Synthetic Route of 1821-27-8, the publication is Propellants, Explosives, Pyrotechnics (2017), 42(7), 706-711, database is CAplus.

A review. Three different gun propellants (A5020, JA-2 or L5460, NK1074) have been investigated up to 35 years by mass loss at isothermal temperatures between 30¡ãC and 90¡ãC. From these data, activation energies for the different reactions of zero order (mass loss increase up to stabilizer consumption) and first order (solvent evaporation at begin) are derived. The mass loss data are described very well by a combination of these two reactions. Stabilizer consumption has been determined by HPLC. In case of diphenylamine (DPA), several consecutive products (mononitro-DPA up to tetranitro-DPA) have been regarded also. Activation energies are in the range of energies obtained by other methods: 84 kJ/mol [A5020], 150 kJ/mol [JA-2], 100 kJ/mol [NK 1074]. Long term measurements show seasonal influence in the mass loss data. Resp. graphs are shown in this work. At least four years of measurement are recommended to compensate for the signal drift caused by seasonal changes.

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, Synthetic Route of 1821-27-8.

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

Padungros, Panuwat published the artcilePractical Synthesis of Aromatic Dithiocarbamates, Safety of Bis(4-nitrophenyl)amine, the publication is Synthetic Communications (2014), 44(16), 2336-2343, database is CAplus and MEDLINE.

Oxidation-sensitive N,N-diaryl dithiocarbamates (DTCs) are synthesized in good yields by the generation of metal amide salts from N-benzoyl precursors, followed by addition of CS₂. para-Substituted diphenylamines are prepared by electrophilic aromatic substitution of diphenylbenzamide and saponification Deacylation of electron-rich species such as bis(p-dimethylaminophenyl)benzamide is challenging because of the oxidative sensitivity of the anionic intermediate but could be achieved in good yield by using n-BuLi to generate a hemiaminal adduct, prior to acidification. The N,N-diaryl DTCs are stable as alkali salts and can be used to produce densely packed monolayers on gold surfaces.

Synthetic Communications 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, Safety of Bis(4-nitrophenyl)amine.

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

Os’kina, I. A. published the artcileReaction of polyfluoroarylamine N-anions with polyfluoro- and nitrohaloaromatic compounds, Application In Synthesis of 1821-27-8, the publication is Izvestiya Sibirskogo Otdeleniya Akademii Nauk SSSR, Seriya Khimicheskikh Nauk (1984), 102-13, database is CAplus.

The reactions of 4-RC₆F₄NH^– Na⁺ (R = F, MeCO, Me, H, CF₃, NC) and the Na salts of 2,3,5,6-tetrafluoro-4-pyridinamine, 4-O₂NC₆H₄NH₂, and 4-nitro-1-naphthylamine with polyfluoro- and nitrohaloarom. compounds were studied in DMF and Me₂SO. The relative rate constants (k) were correlated with the pK values of the corresponding arylamines by log k = 0.74 pK – 14.01. A F atom ortho to the amino group had little effect on the nucleophilic reactivity of the N-anions.

Izvestiya Sibirskogo Otdeleniya Akademii Nauk SSSR, Seriya Khimicheskikh Nauk 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 In Synthesis of 1821-27-8.

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

Wu, Yan published the artcileBroad Exposure of the North American Environment to Phenolic and Amino Antioxidants and to Ultraviolet Filters, Category: catalysis-chemistry, the publication is Environmental Science & Technology (2020), 54(15), 9345-9355, database is CAplus and MEDLINE.

This work comprehensively assessed three suites of commonly used synthetic additives: phenolic and amino antioxidants and UV filters. Concentrations of 47 such compounds and their transformation products were measured in 20 atm. particle samples collected at Chicago, Illinois, in 21 Canadian e-waste dust samples, in 32 Canadian and US residential dust samples, and in 10 Chicago Sanitary and Ship Canal sediment samples. Despite their large US production volumes, environmental data on antioxidants and UV filters in North America is limited. These compounds were detected in all samples, indicating their ubiquitous distribution in the North American environment. The most prevalent compounds were 2,6-di-t-butyl-p-benzoquinone, diphenylamine, 4,4′-di-t-octyl diphenylamine, 2,4-dihydroxybenzophenone, and 2-hydroxy-4-methoxybenzophenone. E-waste dust contained significantly greater total concentrations of these compounds than Canadian residential dust; intermediate levels were detected in US residential dust. Sediment had relatively high N,N’-diphenylbenzidine concentrations whose source was unclear, and some benzotriazole UV filters. Daily intake rates via dust ingestion for these compounds were 1-10 ng/kg-day for adults to 10-100 ng/kg-day for toddlers. Due to the wide distribution of these compounds in ambient and built environments, future research on their potential toxic effects on people and ecosystems is important.

Environmental Science & Technology 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 C5H13Cl2N, Category: catalysis-chemistry.

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

De Jong, A. L. published the artcileHigh-performance liquid chromatographic separation of diphenylamine and its reaction products with nitrogen oxides, Application of Bis(4-nitrophenyl)amine, the publication is Propellants, Explosives, Pyrotechnics (1988), 13(5), 152-6, database is CAplus.

An HPLC method is used to detect and determine Ph₂NH and its reaction products with NO_x, especially in respect to the anal. of single-base propellants. Polygosil 100 C 18 is the packing material, the maximum injection volume of CH₂Cl₂ is 2 ¦ÌL, and the eluent is 10:40:50 MeOH-MeCN-H₂O; detection is done at 210 nm. Normal-phase chromatog. can be used in the separation of Ph₂NH and 2,4,4′-trinitrodiphenylamine, but, in most propellant analyses, retains 4,4′-dinitrodiphenylamine (a major reaction product) excessively. Reversed-phase chromatog. has the advantages of short equilibration time, separating ability for both polar and nonpolar solutes, and good reproducibility of retention times.

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, Application of Bis(4-nitrophenyl)amine.

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

Ritchie, Calvin D. published the artcileAcidity in nonaqueous solvents. VI. Further studies of weak acids in dimethyl sulfoxide solution, Name: Bis(4-nitrophenyl)amine, the publication is Journal of the American Chemical Society (1968), 90(11), 2821-4, database is CAplus.

The potentiometric method, employing a glass electrode, was used to determine the acidities of a series of benzoic acids, several hydrocarbon acids, and some aniline indicators in pure Me2SO solutions The data provide evidence for an important effect of H bonding in protic solvents which decreases the effect of substituents on the acidities of benzoic acids. Studies of the hydrocarbon acids indicate that dispersion interactions of the conjugate bases with Me2SO cause a greater dissociation in this solvent than in protic solvents such as MeOH. The data for the aniline indicators provide a partial check on the validity of the H-acidity function generated by their use.

Journal of the American Chemical Society 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, Name: Bis(4-nitrophenyl)amine.

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