1821-27-8 Archives - Page 6 of 15

Viswanathan, N.’s team published research in Indian Journal of Chemistry, Section B: Organic Chemistry Including Medicinal Chemistry in 20B | CAS: 1821-27-8

Indian Journal of Chemistry, Section B: Organic Chemistry Including Medicinal Chemistry 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 C23H20BN, Related Products of catalysis-chemistry.

Viswanathan, N. published the artcileBase-catalyzed reaction of p- and o-nitroanilines with isocyanates and isothiocyanates, Related Products of catalysis-chemistry, the publication is Indian Journal of Chemistry, Section B: Organic Chemistry Including Medicinal Chemistry (1981), 20B(7), 611-13, database is CAplus.

The reaction of 4-O₂NC₆H₄NH₂ (I) with RC₆H₄NCO (II; R = H, 4-Me, 4-Cl, 3-Cl) in the presence of K₂CO₃ gave 4-O₂NC₆H₄NHC₆H₄R (III). The reaction of I with PrNCO gave (4-O₂NC₆H₄)₂NH. 2-O₂NC₆H₄NH₂ reacted with II (R = H, 4-Me) to give the corresponding 2-O₂NC₆H₄NHC₆H₄R. PhNCS was treated with I to give 4-O₂NC₆H₄N:C(NHPh)₂, III (R = H), and PhNHCSNHPh.

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

Pankratov, Alexei N.’s team published research in Canadian Journal of Chemistry in 77 | CAS: 1821-27-8

Canadian Journal of Chemistry 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.

Pankratov, Alexei N. published the artcileSemiempirical quantum chemical PM3 computations and evaluations of redox potentials, basicities, and dipole moments of the diphenylamine series as analytical reagents, SDS of cas: 1821-27-8, the publication is Canadian Journal of Chemistry (1999), 77(12), 2053-2058, database is CAplus.

By evaluating the obtained results of PM3 computations, the following correlations were found: (i) the diarylamines redox potentials (E) with the first ionization potentials (I); (ii) the pK_n values characterizing both the amines N protonation and the carboxy-substituted reagents dissociation via the COOH group, with the proton affinities of the corresponding diphenylamines and COO^–-containing anions; (iii) the exptl. values of the mols. dipole moments (¦Ì) with the theor. ones. The feasibility of simple semiempirical quantum-chem. evaluation of E, pK_a, and ¦Ì of the diphenylamine series as redox reagents was determined

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

Lutskii, A. E.’s team published research in Zhurnal Fizicheskoi Khimii in 45 | CAS: 1821-27-8

Zhurnal Fizicheskoi Khimii 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.

Lutskii, A. E. published the artcileElectron interactions in polyfunctional organic compounds, Synthetic Route of 1821-27-8, the publication is Zhurnal Fizicheskoi Khimii (1971), 45(4), 754-8, database is CAplus.

The electronic interactions between bridging (Y) and ring (X) substituents of aromatic compounds 4-X1C6H4YC6H4X2-4 (where Y = CO, NH; X1, X2 = H, NO2, MeO, Me2N) were studied by using ir spectra (¦ÍCO, ¦ÍNH) of CCl4, C2H4Cl2, and THF solutions Both ¦ÍCO and ¦ÍNH show solvent effects. The ¦¤¦Í values (referred to unsubstituted compounds) are discussed in terms of X and Y electron-donor or -acceptor capacity and the relation between X1 and X2 conjugation effects. The ¦¤¦Í values of X1 and X2 are non-additive (always less than the sum). Correlations ¦¤¦ÍCO/¦¤E1/2, ¦¤¦ÍNH/¦¤E1/2 (¦¤E1/2 = half-wave potential) and ¦¤¦ÍCO/¦Ò Jaffe are found. If X1 = X2 the ring substituent effect is concurrent with that of Y. If X1 and X2 are not the same, the predominant effect is the effect of X which has the sign for the conjugation effect opposite, to that of Y.

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

Terrier, Francois’s team published research in Comptes Rendus des Seances de l’Academie des Sciences, Serie C: Sciences Chimiques in 263 | CAS: 1821-27-8

Comptes Rendus des Seances de l’Academie des Sciences, Serie C: Sciences Chimiques 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 C7H14N4, Synthetic Route of 1821-27-8.

Terrier, Francois published the artcileComparison between acidity functions of KOMe and NaOMe in MeOH, Synthetic Route of 1821-27-8, the publication is Comptes Rendus des Seances de l’Academie des Sciences, Serie C: Sciences Chimiques (1966), 263(6), 476-9, database is CAplus.

The following pK values were determined with indicators in KOMe and NaOMe up to 5.5M, resp.: 2,4-dinitrodiphenylamine, 17.16, 17.16; 4,4′-dinitrodiphenylamine 17.49, 17.49; 2,4-dinitroaniline 18.40, 18.35; 4-nitrodiphenylamine 19.62, 19.24; 2,4-dichloro-6-nitroaniline 19.83, 19.36; 2-nitrodiphenylamine 21.36, 20.37; o-nitroaniline 22.30, 21.45; p-nitroaniline 22.40, 21.67. Different solvations of the ions MeOH₂ + .qMeOH and MeO-.p-MeOH are postulated. Important divergences appear rapidly between the 2 acidity functions in each of 2 media (H_m = pK_a + log c + f[log(MeOH)] and J_m = pK_a + log [A-]/[AH]).

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

Vermesse-Jacquinot, Claude’s team published research in Compt. Rend. in 254 | CAS: 1821-27-8

Compt. Rend. 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 C15H21BO3, Recommanded Product: Bis(4-nitrophenyl)amine.

Vermesse-Jacquinot, Claude published the artcileSpectrophotometric study of the autoprotolytic reaction of 2-aminoethanol, Recommanded Product: Bis(4-nitrophenyl)amine, the publication is Compt. Rend. (1962), 3679-81, database is CAplus.

The autoprotolytic reaction of 2 aminoethanol (I) (2 NH₂CH₂CH₂OH ? NH₃⁺CH₂CH₂OH + NH₂CH₂CH₂O^–) was studied. The value of pK was determined to be 5.14 at 20¡ã, on the basis of previous measurements (CA 55, 17181e) and of measurements of the optical d. of solutions of 4,4′-dinitrodiphenylamine and 2,4-dinitrodiphenylamine in I at 5800 and 5100 A., resp.

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

Koshkin, L. V.’s team published research in Izvestiya Vysshikh Uchebnykh Zavedenii, Khimiya i Khimicheskaya Tekhnologiya in 28 | CAS: 1821-27-8

Izvestiya Vysshikh Uchebnykh Zavedenii, Khimiya i Khimicheskaya Tekhnologiya 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.

Koshkin, L. V. published the artcileAntioxidative effectiveness of secondary aromatic amines in the oxidation of SKS 30 ARK rubber, Application of Bis(4-nitrophenyl)amine, the publication is Izvestiya Vysshikh Uchebnykh Zavedenii, Khimiya i Khimicheskaya Tekhnologiya (1985), 28(8), 97-100, database is CAplus.

The effectiveness of aromatic amines as antioxidants for SKS 30ARK (SBR) increased with increasing electron donor properties of para substituents (Br, Me, OMe, NMe₂) on the Ph rings, with increasing ¦Ð electron d. of the aromatic rings, and on introducing ortho or para NO₂ groups in Ph₂NH. The antioxidative action of the nitro derivatives was attributed to interaction of the NO₂ groups with C radicals of the oxidizing polymer. Other amines interacted with O radicals. A synergistic antioxidative effect was observed for mixts of p-O₂NC₆H₄NHPh [836-30-6] and N-¦Â-naphthyl-N-phenylamine??[135-88-6].

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

Curtis, N. J.’s team published research in Propellants, Explosives, Pyrotechnics in 12 | CAS: 1821-27-8

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.

Curtis, N. J. published the artcileDetermination of derivatives of diphenylamine in Australian gun propellants by high performance liquid chromatography, Application of Bis(4-nitrophenyl)amine, the publication is Propellants, Explosives, Pyrotechnics (1987), 12(5), 158-63, database is CAplus.

HPLC was developed for the determination of diphenylamine and its N-nitroso- and C-nitro derivatives in single-base gun propellants. Only 2- and 4-nitrodiphenylamine, 2,2′-, 2,4′- and 4,4′-dinitrodiphenylamine, 2,2′,4- and 2,4,4′-trinitrodiphenylamine, 2,2′,4,4′-tetranitrodiphenylamine, N-nitrosodiphenylamine, and 4-nitro-N-nitrosodiphenylamine were found in major amounts Minor derivatives noted were 2,4′-dinitrodiphenylamine, 2-nitro-N-nitrosodiphenylamine, and 2,4′- and 4,4′-dinitro-N-nitrosodiphenylamine. Other derivatives were not found. This HPLC method can be used to quantify all of the major derivatives in a single chromatogram and can be used even in the presence of the propellant additives dinitrotoluene, bis(ethylhexyl) phthalate, and di-Bu phthalate.

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

Sopranetti, A.’s team published research in Symposium on Chemical Problems Connected with the Stability of Explosives, [Proceedings] in 4 | CAS: 1821-27-8

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 C18H10, Product Details of C12H9N3O4.

Sopranetti, A. published the artcileSimultaneous analysis of stabilizers and their decomposition products by gas chromatography – application of the new methods for the judging of propellants by the 65.5.degree.C surveillance test, Product Details of C12H9N3O4, the publication is Symposium on Chemical Problems Connected with the Stability of Explosives, [Proceedings] (1977), 73-98, database is CAplus.

Gas chromatog. (GC) is not able to sep. PH2NH (I) [122-39-4] and Ph2NNO (II) [86-30-6] in I-stabilized propellants because II is thermally unstable and is converted partially or wholly to I. An acylation product of I (with heptafluorobutyric acid anhydride) is easily synthesized at ambient temperature and has high thermal and hydrolytic stability. Moreover, the retention time of this compound is shorter than that of I and its nitration products. Thus, in GC the acylized I appears as the first peak, followed by II, which decomposed into I, and then the further nitrated I. I and its consecutive products are isolated from propellant grains by mech. crushing with no heat to a particle size <0.25 mm., followed by extraction by stirring at ambient temperature with CH2Cl2. The transformation rate of I and the formation of its consecutive products in propellants subjected to the 65.5.degree. heat test can be checked by GC. When dealing with propellants of comparable composition, the safe life can now be judged after 60 day storage.

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

Sopranetti, A.’s team published research in Symposium on Chemical Problems Connected with the Stability of Explosives, [Proceedings] in 5 | CAS: 1821-27-8

Sopranetti, A. published the artcilePossibilities and limitations of high performance liquid chromatography for the characterization of stabilizers and their daughter products in comparison with gas-chromatography, Computed Properties of 1821-27-8, the publication is Symposium on Chemical Problems Connected with the Stability of Explosives, [Proceedings] (1979), 5(1), 163-81, database is CAplus.

The determination of Ph₂NH [122-39-4], N-nitrosodiphenylamine (I) [86-30-6], 2,2′-dinitrodiphenylamine [18264-71-6], trinitrodiphenylamine [64800-21-1], and 4,4′-dinitrodiphenylamine [1821-27-8] in propellants is discussed. High-performance liquid chromatog. and gas chromatog. are compared. The former process is better for determining Ph₂NH and for determining nitramines in triple-base propellants. The latter process is better for determining the higher nitrated derivatives not containing Ph₂NH and I.

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

Stephan, M.’s team published research in Internationale Jahrestagung – Fraunhofer-Institut fuer Treib- und Explosivstoffe in | CAS: 1821-27-8

Internationale Jahrestagung – Fraunhofer-Institut fuer Treib- und 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 C9H9BrO2, Synthetic Route of 1821-27-8.

Stephan, M. published the artcileComparative study of the stabilizing effect of diphenylamine and its derivatives, Synthetic Route of 1821-27-8, the publication is Internationale Jahrestagung – Fraunhofer-Institut fuer Treib- und Explosivstoffe (1980), 237-50, database is CAplus.

A comparative study was made of the stabilizing effect of diphenylamine [122-39-4] and its derivatives on nitrocellulose [9004-70-0] propellants by heating in a vacuum and measurements of stabilizer consumption and nitrocellulose viscosity during aging. The stabilizing action of the derivatives can be classified differently for each individual test.

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