Category: 1821-27-8

Dasgupta, G. published the artcileOxidation of diphenylamines by alkaline hexacyanoferrate(III). A kinetic study, SDS of cas: 1821-27-8, the publication is Oxidation Communications (2009), 32(2), 390-394, database is CAplus.

Oxidation of diphenylamines by alk. hexacyanoferrate(III) in aqueous methanol was dependent on the first powers of the concentrations of substrate and oxidant, but was independent of the concentration of alkali in the range studied. The Hammett plot gave a value of ¦Ñ = -1.0 The reaction proceeded via the formation of the diphenylamino radical, which was characterized by ESR spectroscopy.

Oxidation 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, SDS of cas: 1821-27-8.

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

Landini, Dario published the artcileNucleophilic aromatic substitution reactions promoted by aryl and heteroaryl amine nitranions, Name: Bis(4-nitrophenyl)amine, the publication is New Journal of Chemistry (1998), 22(1), 71-74, database is CAplus.

Nucleophilic substitution reaction of Cl in 4-ClC₆H₄NO₂ by N-anions from RNH₂ (R = C₆F₅, 4-O₂NC₆H₄, tetrafluoro-4-pyridyl, 4-NCC₆F₄) to give the corresponding diarylamines was studied in solvents of different polarity (PhMe and DMSO). The reactivity of these nitranions is 2 orders of magnitude higher in DMSO. Such a difference is attributed to the different reacting species (ion pairs vs. free ions in PhMe and DMSO, resp.). The ¦Â_Nu values obtained (0.31 and 0.26), very similar and relatively low, suggest a moderate extent of charge transfer from nucleophile to substrate in the transition state of both systems.

New 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, Name: Bis(4-nitrophenyl)amine.

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

Kovtun, G. A. published the artcileReactivity of aromatic amines with peroxyl radicals, Computed Properties of 1821-27-8, the publication is Doklady Akademii Nauk Ukrainskoi SSR, Seriya B: Geologicheskie, Khimicheskie i Biologicheskie Nauki (1990), 36-9, database is CAplus.

Rate constants were determined for H abstraction from Ph₂NH, (4-O₂NC₆H₄)₂NH, 1-naphthylamine, and 4-RC₆H₄NHMe (I; R = MeO, Me, Me₃C, H, Cl, Br, O₂N) by R¹OO^? (II; R¹ = H, PhCHMe, PhCMe₂) at 75¡ã. A linear Hammett-type relation for the reactions of I with II (R¹ = PhCMe₂) yielded ¦Ñ = -1.8. The rates did not depend on R¹.

Doklady Akademii Nauk Ukrainskoi SSR, Seriya B: Geologicheskie, Khimicheskie i Biologicheskie Nauki 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, Computed Properties of 1821-27-8.

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

Kovtun, G. A. published the artcileMechanism of the inhibition of oxidation reactions by metal complexes. 2. Effect of substituents in the imino component of a Schiff base on the antioxidant properties of copper salicylaldiminates, Synthetic Route of 1821-27-8, the publication is Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya (1979), 293-7, database is CAplus.

I (R = H, OH, Me, MeO, NO₂) and II participated repeatedly in chain terminations (in the oxidation of cyclohexylamine) via reaction with ¦Á-amino peroxy radicals (III). The rate constants of single-electron oxidation and reduction of III decreased with increasing donor character of R. The rates of chain termination by (4-RC₆H₄)₂NH increased with increasing donor character of R.

Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya 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

Younis, Muhammad published the artcileReversible Transformation between Azo and Azonium Bond Other than Photoisomerization of Azo Bond in Main-Chain Polyazobenzenes, Recommanded Product: Bis(4-nitrophenyl)amine, the publication is Journal of Physical Chemistry Letters (2021), 12(14), 3655-3661, database is CAplus and MEDLINE.

Although side-chain polyazobenzenes have been extensively studied, main-chain polyazobenzenes (abbreviated MCPABs) are rarely reported due to the challenges associated with difficulty in synthetic chem. and photoisomerization of azo bonds in MCPABs. Thus, it is highly demanded to develop new mechanisms other than photoisomerization of azo bonds in MCPABs to extend their applications. In this work, we created a new series of N-linked MCPABs via fast NaBH₄-mediated reductive coupling polymerization on N-substituted bis(4-nitrophenyl)amines. The structure of MCPABs has been characterized by comprehensive solid-state NMR experiments such as CPMAS ¹³C NMR with long and short contact times, cross-polarization polarization-inversion (CPPI), and cross-polarization nonquaternary suppressed (CPNQS). The azo bonds in MCPABs were found to be promising for acid vapor sensing, being acidified to form azonium ion with significant color change from red to green. And the azonium of MCPABs turned from green to red when exposed to base vapor, thus suitable for base vapor sensing.

Journal of Physical Chemistry Letters 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 C9H8BNO2, Recommanded Product: Bis(4-nitrophenyl)amine.

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

Shorygin, P. P. published the artcileSpectroscopic study of nitroaromatic amines, Recommanded Product: Bis(4-nitrophenyl)amine, the publication is Zhurnal Fizicheskoi Khimii (1965), 39(12), 2868-76, database is CAplus.

The ir, uv, and Raman spectra of PhNO₂ and p-XHNC₆H₄NO₂ in the vapor and in solution in different solvents were compared. For amino derivatives, 2 bands in the frequency region of NO₂-groups, ¦Ø₈, were characteristic. These were sensitive to solvents and temperature The effect of solvents on the vibration frequency of the nitrile groups, ¦Ø_CN, was similar for p-H₂NC₆H₄NO₂ and p-Me₂NC₆H₄NO₂ but was much weaker than the effect on ¦Ø₈. Alkylation of the amino group affected the frequency of the NO₂ group to a much greater degree than that of the NH₂ group. This was true not only of solutions but also of vapors suggesting the possibility that in isolated mols. the NO₂ group affects the rigidity of the N-O bond through the system of ¦Ð-bonds of the C₆H₆ ring. In neutral solvents and in the gaseous phase ¦Ø₈ of derivatives with X = NH₂, Ph, and H₂NC₆H₄ was about the same. This was also true of 4,3,5-H₂NX₂C₆H₂NO₂, where X = H, Cl, Br.

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 C8H6ClF3, Recommanded Product: Bis(4-nitrophenyl)amine.

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

Shorygin, P. P. published the artcileSpectroscopic study of the most important combinations of atomic groups in complex molecules of organic compounds. 3. Nitroaromatic compounds, HPLC of Formula: 1821-27-8, the publication is Russian Chemical Bulletin (Translation of Izvestiya Akademii Nauk, Seriya Khimicheskaya) (1998), 47(2), 297-302, database is CAplus.

The IR spectra of several compounds containing the nitro group were studied. Based on these and previous data, the state of the nitro group depending on the structure of the fragments bound to the nitrophenyl group was discussed. The redistribution of the electron d. during vibrations of the nitro group and the substituent atoms was considered. The effects of the ¦Ð-bond system, bridging atoms separating the nitrophenyl group from the substituents, and heavy atoms adjacent to the bridging atom were characterized. The data obtained facilitates the selection of mol. structures satisfying the specified requirements of practical applications.

Russian Chemical Bulletin (Translation of Izvestiya Akademii Nauk, Seriya Khimicheskaya) 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 C5H7NO, HPLC of Formula: 1821-27-8.

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

Thomas, Jennifer L. published the artcileSeparation and detection of smokeless powder additives by ultra performance liquid chromatography with tandem mass spectrometry (UPLC/MS/MS), Application In Synthesis of 1821-27-8, the publication is Journal of Forensic Sciences (2013), 58(3), 609-615, database is CAplus and MEDLINE.

A reversed phase gradient ultra performance liquid chromatog. tandem mass spectrometry (UPLC/MS/MS) method has been developed for the anal. of smokeless powders. A total of 20 different components were separated by UPLC and detected by MS/MS in multiple reaction monitoring (MRM) mode. These compounds included diphenylamines, centralites, nitrotoluenes, nitroglycerin, and various phthalates. Simultaneous pos. and neg. electrospray ionization (ESI) was used along with neg. atm. pressure chem. ionization (APCI) to detect all compounds in a single anal. Anal. times were under 8 min with a gradient of 10-73% organic at a flow rate of 0.500 mL/min. With this method, UV and MRM limits of detection ranging from 0.08 to 2.6 ng and 0.4-64 ng injected were achieved. Com. available smokeless powders were also extracted with methylene chloride and characterized using the developed UPLC/MS/MS method. The procedure permits the determination of compositional differences between different brands as well as lot-to-lot variations.

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 C7H5Br2F, Application In Synthesis of 1821-27-8.

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

Iogansen, A. V. published the artcileEffect of the intermolecular and vibration interactions on the infrared absorption bands of nitro groups, Quality Control of 1821-27-8, the publication is Optika i Spektroskopiya (1964), 16(4), 700-2, database is CAplus.

The influence of solvent and H bonds on the frequencies and integral intensities of the bands of symmetry (v_s. A_s) and anti-symmetry (¦Í_as, A_as) of nitro group valence vibrations was studied in an investigation of the infrared spectra of nitro compounds The accuracy of the frequency determination was ¡À0.5 cm.^-1, and of the integral intensity, was 5-10%. For PhNO₂ and MeNO₂ in such solvents as cyclohexane, CCl₄, dioxane, CHCl₃, CHBr₃, tetrachloroethylene, BuOH, and piperidine, the intensity changes and frequency shifts of both bands were insignificant. The bands of the valence vibrations of the nitro group were only slightly susceptible to internal interactions and to H bonding. Splitting of the v_s bands was indicated for all aromatic p-nitro amino compounds, such as p-nitroaniline, p-nitrodimethylaniline, and p-nitrodiethylaniline. The infrared absorption spectra of solutions of p-nitroaniline and p-nitrodimethylaniline in CHCl₃ and dioxane are presented. The behavior of the ¦Í_s components of p-nitroaniline in dioxane indicated that formation of H bonds between the NH₂ and dioxane influenced the C-N vibration so as to change the condition for resonance of NO₂ and CN, as well as the intensity distribution. Such behavior was lacking in p-nitrodi- methylaniline, where there is no NH linkage.

Optika i Spektroskopiya 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, Quality Control of 1821-27-8.

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

Iogansen, A. V. published the artcileThe effect of conjugation on the infrared spectra of nitro compounds, Quality Control of 1821-27-8, the publication is Doklady Akademii Nauk SSSR (1963), 153(6), 1367-9, database is CAplus.

Tabulated for RNO₂ (R = Me, cyclohexyl, 1-cyclohexenyl, 1-naphthyl), p-RC₆H₄NO₂ (I, R = H, Cl, Me, I, OH, NH₂, NMe₂, NEt₂), o-dinitrobenzene, and 4,4′-dinitrodiphenylamine are the integrated intensities (A) of the sym. and asym. bands at 1300-1400 and 1500-1600 cm.^-1, resp. With increasing conjugation, A_sym. increased greatly, becoming the strongest band in the spectra, while A_asym. remained constant Addnl. values of A_sym. were calculated from the intensities of Raman bands for I (R = tert-Bu, vinyl, Ph, 1,3-butadien-1-yl, ¦Â-styryl, and ¦Á-phenyl-¦Â-styryl). The length of the conjugated system as projected on the C-N plane is proportional to (A_sym.)^1/2. Differentiation of conjugated and nonconjugated nitro compounds is greatly facilitated.

Doklady Akademii Nauk SSSR 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, Quality Control of 1821-27-8.

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