Curtis, Neville J. published the artcileIsomer distribution of nitro derivatives of diphenylamine in gun propellants: nitrosamine chemistry, COA of Formula: C12H9N3O4, the publication is Propellants, Explosives, Pyrotechnics (1990), 15(5), 222-30, database is CAplus.
The derivatization of diphenylamine in single-base gun propellants was studied as a function of aging at 80¡ã. The relative proportions of 2-nitrodiphenylamine (I) and 4-nitrodiphenylamine (II) varied from 32:68 to 63:37, according to propellant type. Preferences for para substitution were seen in exptl. lots stabilized with I, II, and N-nitrosodiphenylamine. Increasing water content resulted in higher preferences for ortho substitution. II is a better stabilizer than I. Model studies with nitro-substituted N-nitrosamines show that para substitution is preferred in boiling AcOH. Mechanisms for the conversion of N-nitrosamines into isomeric nitro derivatives are discussed in relation to the model studies and the behavior in propellants. Procedures are given for the preparation of N-nitrosamines.
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, COA of Formula: C12H9N3O4.
Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia