IUPAC name of the compounds is :-2-nitro-4-bromobenzoic acid4-bromo-3-nitrobenzoic acid4-bromo-2-nitrobenzoic acid4-bromo-3-nitrobenzenecarboxylic acid

To derive the IUPAC names of the given compounds, let's break down the names and identify the structural components.

1. Identify the Substituents and the Main Chain: Each name includes a base structure, which is benzoic acid (or benzenecarboxylic acid), with nitro and bromo substituents at different positions on the benzene ring.

2. Determine the order of substituents: According to IUPAC nomenclature, substituents are named in alphabetical order regardless of their position numbers. The prefixes like di-, tri-, etc. don’t affect the alphabetical ordering.

3. Analyze Substituent Positions: The given names specify the positions of the nitro and bromo groups relative to the carboxylic acid group (which is usually given priority in numbering).

4. Explicit Naming Review:

   • 2-nitro-4-bromobenzoic acid: Nitro on C-2, bromo on C-4 of a benzoic acid.
   • 4-bromo-3-nitrobenzoic acid: Bromo on C-4, nitro on C-3 of a benzoic acid.
   • 4-bromo-2-nitrobenzoic acid: Bromo on C-4, nitro on C-2 of a benzoic acid.
   • 4-bromo-3-nitrobenzenecarboxylic acid: Same as previous, emphasizing the carboxylic acid.

Each of these compounds follows standard IUPAC nomenclature rules. The main component is a benzoic acid, with varying halogen and nitro substituents at different positions.

For further clarification or specific analysis of the compounds, please provide their structures or more context.