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 (vs. As) and anti-symmetry (¦Ías, Aas) 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 vs 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 ¦Ís 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