Category: 1821-27-8

Bohn, Manfred A. published the artcileKinetic modeling of the stabilizer consumption and of the consecutive products of the stabilizer in a gun propellant, Category: catalysis-chemistry, the publication is Propellants, Explosives, Pyrotechnics (1997), 22(3), 125-136, database is CAplus.

Diphenylamine (DPA) is used for the stabilization of solid propellants based on nitrocellulose. It reacts with the autocatalytically acting decomposition product of nitrocellulose and forms consecutive products, which also stabilize. The kinetics of these stabilizing reactions are described by 4 reaction models. With respect to DPA and the DPA consecutive products the models have 1, 2, and 4 steps. The 4-step model contains the DPA consecutive products up to trinitro-DPA. By approximations an anal. equation for the stabilizer decrease was derived, which describes the stabilizer consumption very well. The other equation systems were integrated numerically by a Runge-Kutta procedure and their reaction rate constants were obtained by a non-linear least squares fit parameter calculation This allows an evaluation of the reaction kinetic models. Relative reactivities of the DPA consecutive products with respect to DPA are calculable with the obtained reaction rate constants and an effective DPA concentration can be established. The different reactivities of mixed stabilizers as N-methyl-p-nitroanaline (MNA) and 2-NO₂-DPA can be described with the presented method of modeling.

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, Category: catalysis-chemistry.

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

Bohn, Manfred A. published the artcileKinetic modeling of the stabilizer consumption and the secondary stabilizers in a gun propellant, Recommanded Product: Bis(4-nitrophenyl)amine, the publication is International Annual Conference of ICT (1996), 96.1-96.18, database is CAplus.

Diphenylamine stabilizer (especially for solid propellants based on nitrocellulose) reacts with the decomposition products of nitrocellulose to form products with also act as stabilizers (i.e., mono-, di-, and trinitrodiphenylamines). The kinetics of these stabilizing reactions were described by various reaction schemes. The least squares fit of the calculated reaction profiles (from exptl. data of F. Volk) was used to evaluate the schemes and to derive reaction constants

International Annual Conference of ICT 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

Nguyen, Tong Hoang Oanh published the artcileStudy on influence of 2-nitrodiphenylamine and some different diphenylamine nitro derivatives on polarographic catalytic current in solution containing Co²⁺-NO₂^–, Formula: C12H9N3O4, the publication is Tap Chi Phan Tich Hoa, Ly Va Sinh Hoc (2002), 7(2), 57-61, database is CAplus.

The effect of nitro-substituted diphenylamine derivatives including 2-nitrodiphenylamine (2-NDPA), 4,4′-dinitrodiphenylamine (4,4′-DNDPA), and 2,4,4′-trinitrodiphenylamine (2,4,4′-TNDPA) on polarog. catalytic current in solution containing Co²⁺-NO₂^– was studied by cathodic adsorption stripping voltammetric method. All the nitro-substituted diphenylamines showed catalytic activation effect in solution containing Co²⁺-NO₂^–. The capability of these diphenylamine derivatives to form intermediate complexes that have catalytic activity and electrochem. adsorption between ions Co²⁺-NO₂^– ions with organic ligands was dependent on the type of the diphenylamine compounds

Tap Chi Phan Tich Hoa, Ly Va Sinh Hoc 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, Formula: C12H9N3O4.

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

Nguyen, Tong Hoang Oanh published the artcileInfluence of nature and organic solvent on kinetics and depolarization mechanism of dephenylamine nitro derivatives, Recommanded Product: Bis(4-nitrophenyl)amine, the publication is Tap Chi Hoa Hoc (2003), 41(3), 18-24, database is CAplus.

In this paper we report the research results on influence of nature and ratios organic solvents in ammonium buffer on kinetics and mechanism of electrochem. depolarization of diphenylamine nitro derivatives like 2-nitrodiphenylamine, 4,4′-dinitrodiphenylamine and 2,4,4′-trinitrodiphenylamine aimed to clarify the nature of electrode process and find out the optimal condition for analyze them by square voltamperometry with hanging mercury drop electrode.

Tap Chi Hoa Hoc 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

Nguyen, Tong Hoang Oanh published the artcileStudy on characteristics of the cathodic adsorption stripping voltammetric effect in solution containing 4,4′-dinitrodiphenylamine and possibility of application in analysis, Name: Bis(4-nitrophenyl)amine, the publication is Tap Chi Phan Tich Hoa, Ly Va Sinh Hoc (2001), 6(3), 14-17, database is CAplus.

The authors report the researched results of properties of cathodic adsorption stripping voltammetric effect in ammoniacal buffer solution containing 4,4′-dinitrodiphenylamine by square wave voltammetry using hanging mercury drop electrode. With the high sensibility the method can be applied for determination of 4,4′-dinitrodiphenylamine in the other nitrocellulose materials.

Tap Chi Phan Tich Hoa, Ly Va Sinh Hoc 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

Pratt, Derek A. published the artcileSubstituent Effects on the Bond Dissociation Enthalpies of Aromatic Amines, Recommanded Product: Bis(4-nitrophenyl)amine, the publication is Journal of the American Chemical Society (2002), 124(37), 11085-11092, database is CAplus and MEDLINE.

Bond dissociation enthalpy differences, Z-X ¦¤BDE = BDE(4-YC₆H₄Z-X) – BDE(C₆H₅Z-X), for Z = CH₂ and O are largely independent of X and are determined mainly by the stabilization/destabilization effect of Y on the 4-YC₆H₄Z^? radicals. The effects of Y are small (¡Ü2 kcal/mol for all Y) for Z = CH₂, but they are large for Z = O, where good correlations with ¦Ò_p⁺(Y) yield ¦Ñ⁺ = 6.5 kcal/mol. For Z = NH, two sets of electrochem. measured N-H ¦¤BDEs correlate with ¦Ò_p⁺(Y), yielding ¦Ñ⁺ = 3.9 and 3.0 kcal/mol. However, in contrast to the situation with phenols, these data indicate that the strengthening effect on N-H BDEs of electron-withdrawing (EW) Y’s is greater than the weakening effect of electron-donating (ED) Y’s. Attempts to measure N-H ¦¤BDEs in anilines using two nonelectrochem. techniques were unsuccessful; therefore, we turned to d. functional theory. Calculations on 15 4-YC₆H₄NH₂ gave N-H ¦¤BDEs correlating with ¦Ò_p⁺ (¦Ñ⁺ = 4.6 kcal/mol) and indicated that EW and ED Y’s had comparable strengthening and weakening effects, resp., on the N-H bonds. To validate theory by connecting it to experiment, the N-H ¦¤BDEs of four 4,4′-disubstituted diphenylamines and five 3,7-disubstituted phenothiazines were both calculated and measured by the radical equilibration EPR technique. For all compounds, theory and experiment agreed to better than 1 kcal/mol. Dissection of N-H ¦¤BDEs in 4-substituted anilines and O-H ¦¤BDEs in 4-substituted phenols into interaction enthalpies between Y and NH₂/OH (mol. stabilization/destabilization enthalpy, MSE) and NH^?/O^? (radical stabilization/destabilization enthalpy, RSE) reveals that for both groups of compounds, ED Y’s destabilize the mol. and stabilize the radical, while the opposite holds true for EW Y’s. However, in the phenols the effects of substituents on the radical are roughly 3 times as great as those in the mol., whereas in the anilines the two effects are of comparable magnitudes. These differences arise from the stronger ED character of NH₂ vs OH and the weaker EW character of NH^? vs O^?. The relatively large contributions to N-H BDEs in anilines arising from interactions in the mols. suggested that N-X ¦¤BDEs in 4-YC₆H₄NH-X would depend on X, in contrast to the lack of effect of X on O-X and CH₂-X ¦¤BDEs in 4-YC₆H₄O-X and 4-YC₆H₄CH₂-X. This suggestion was confirmed for X = CH₃, H, OH, and F, for which the calculated NH-X ¦¤BDEs yielded ¦Ñ⁺ = 5.0, 4.6, 4.0, and 3.0 kcal/mol, resp.

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, Recommanded Product: Bis(4-nitrophenyl)amine.

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

Cauquis, G. published the artcileElectrochemical properties of diphenylamines and of their oxidation products in organic media. III. p,p’-Disubstituted diphenylamines and production of their primary cation radicals, SDS of cas: 1821-27-8, the publication is Electrochimica Acta (1976), 21(8), 557-65, database is CAplus.

The electrochem. oxidation of 2,2′,4,4′-tetramethoxydiphenylamine [7093-78-9] on bright Pt in neutral media, studied by cyclic voltammetry, ESR, and uv spectroscopy, gives 3 waves. The 1st wave corresponds to formation of the stable radical cation [54323-77-2], the 2nd wave to further oxidation to the nitrenium ion [61236-17-7] via the dication, and the final step results in formation of the aryl p-benzoquinoneimine. In 2,6-lutidine the nitrenium ion is observed before conversion to a heptamethoxydihydrophenazine, the exact formula of which is unknown. Oxidation of p,p’-disubstituted diphenylamines, e.g. p,p’-diaminodiphenylamine [537-65-5] in basic media gives the corresponding radical cations. In strong base, these lead to tetraarylhydrazines but in pyridine-like bases and, in some cases, H2O diaryldihydrophenazines are formed.

Electrochimica Acta 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

Denisov, E. T. published the artcileEnergy of N-H-bond dissociation in phenothiazines and diphenylamines, SDS of cas: 1821-27-8, the publication is Russian Journal of Physical Chemistry A (2014), 88(4), 643-651, database is CAplus.

Energies of the dissociation of N-H-bonds (D_N-H) in 3 phenothiazines, phenoxazine, phenoselenoazine, and 9 diphenylamines (AmH) are determined The D_N-H values are calculated from kinetic data by means of intersecting parabolas. The rate constants of the following types of reaction are used in calculations: RO^.₂ + Am_iH, R^. + Am_iH, Am^._i + PhMe₂CH, and Am^._i + ROOH. As a rule, the results obtained for the reactions of different types are in good agreement with each other and with the results obtained using other methods.

Russian Journal of Physical Chemistry A 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

Lombardi, Christopher published the artcileSelective Cross-Coupling of (Hetero)aryl Halides with Ammonia To Produce Primary Arylamines using Pd-NHC Complexes, Category: catalysis-chemistry, the publication is Organometallics (2017), 36(2), 251-254, database is CAplus.

Herein we report the first example of (hetero)arylation of ammonia using a monoligated palladium-NHC complex. The new, rationally designed, precatalyst (DiMeIHept^Cl)Pd(allyl)Cl featuring highly branched alkyl chains has been shown to be effective in selective aminations across a range of challenging substrates, including nitrogen-containing heterocycles and those featuring base-sensitive functionality. The less bulky Pd-PEPPSI-IPent^Cl precatalyst performs well for ortho-substituted aryl halides, giving monoarylated products in high yield with good selectivity.

Organometallics 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, Category: catalysis-chemistry.

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

Bausinger, Tobias published the artcileDetermination of nitrodiphenylamines and related compounds in the leachate water of a military contaminated site, Product Details of C12H9N3O4, the publication is Umweltwissenschaften und Schadstoff-Forschung (2005), 17(1), 7-12, database is CAplus.

Nitrodiphenylamines can be found at abandoned military sites where the explosive 2,2′,4,4′,6,6′-hexanitrodiphenylamine (hexyl) or diphenylamine as a stabilizer of smokeless powder was handled. Aim of the present study is the development of HPLC methods for the anal. of contaminants which can be expected in particular under aerobic conditions at premises which are contaminated by nitrodiphenylamines and related compounds A list of 13 compounds which can be expected at these explosives factories was deduced from literature studies. HPLC methods were developed for the analytes. Water samples from the unsaturated zone of a former hexyl-producing factory were collected by suction cups and the material was analyzed according to these procedures to demonstrate the practicability of the new methods and to verify the existence of the postulated compounds in the environment of the former nitration plant. The new HPLC methods are suitable for the exploration of sites contaminated by nitrodiphenylamines. Beside some hexyl its intermediates 1-chloro-2,4-dinitrobenzene, 2,4-dinitrodiphenylamine and 2,2′,4,4′-tetranitrodiphenylamine were identified in the leachate water. It is advisable to include at least these 4 compounds in the examination of former hexyl-producing plants. Several unknown peaks were observed in the HPLC-chromatogram. It is recommendable to perform further investigations of the unidentified compounds to compile a final list of analytes for military sites polluted by nitrodiphenylamines.

Umweltwissenschaften und Schadstoff-Forschung 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