Question

Name the given aromatic compound according to IUPAC.

• A. 1-Nitro-4-Bromobenzene
• B. 1-Bromo-4-nitrobenzene
• C. 1-Bromonitrobenzene
• D. 1-Nitrobromobenzene

Answer 1

The correct option is B 1-Bromo-4-nitrobenzene

When present as substituents, -X (F, Cl, Br, I), $-N{O}_2$ are always used as prefixes. If more than one substituent is present, the chain is numbered from direction that will result in lowest possible number in the name of compound. Substituents are listed in alphabetical order (not numbered order).
So, the correct IUPAC name is 1-bromo-4-nitrobenzene.