Lopatin, B. V. published the artcileVibrational interaction of atomic groups in molecules of nitroaromatic compounds, Synthetic Route of 1821-27-8, the publication is Zhurnal Prikladnoi Spektroskopii (1985), 43(4), 616-20, database is CAplus.
The IR and Raman spectra of 4-O2NC6H4XC6H4NO2-4 (X = a bond, NH, C:C, trans-CH:CH, CH2, O, S, Se, SS, CH2CH2), p-dinitrobenzene (I), and other dinitro compounds were analyzed. The unusually large vibrational interaction of the NO2 groups in I and certain other compounds was discussed.
Zhurnal Prikladnoi Spektroskopii 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