Shtark, A. A. published the artcileAction of electrophilic agents on polyfluoro aromatic compounds. XIII. Nitrofluorination of hexafluorobenzene and the compounds C6F5X (X = hydrogen, chlorine, bromine). Orienting effect of the substituents X and relative stability of corresponding monosubstituted hexafluorobenzenonium ions, COA of Formula: C6HBrF4O, the publication is Zhurnal Organicheskoi Khimii (1976), 12(7), 1499-508, database is CAplus.
In HNO3-HF solution C6F5R (R = H, F, Cl, Br) add NO2+ and F- in positions para to each other. When R = H, Cl, or Br, the NO2+ enters meta to R. This orientation reflects the stability of the benzenonium ion when R = H but not when R = Cl or Br.
Zhurnal Organicheskoi Khimii published new progress about 1998-61-4. 1998-61-4 belongs to bromides-buliding-blocks, auxiliary class Fluoride,Bromide,Benzene,Phenol, name is 4-Bromo-2,3,5,6-tetrafluorophenol, and the molecular formula is C12H9NO, COA of Formula: C6HBrF4O.
Referemce:
https://en.wikipedia.org/wiki/Bromide,
bromide – Wiktionary