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, ¦ØCN, 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