See image — IUPAC and Nomenclature Chemistry Question

💡 Solution & Explanation

Step 1 - Identify the parent structure: The molecule contains a benzene ring as the core structure. Step 2 - Identify the substituents: Two substituents are present on the benzene ring. (a) At one position, there is a -C(=O)CH3 group, which is an acetyl (ethanone) group. (b) At the meta (1,3) position relative to the acetyl group, there is a -NO2 group (nitro group), drawn with a positively charged nitrogen bonded to a negatively charged oxygen and a double-bonded oxygen. Step 3 - Determine regiochemistry: The two substituents are in a 1,3 (meta) relationship on the benzene ring, as visible from the structural drawing. Step 4 - Apply IUPAC nomenclature: The principal characteristic group is the ketone (acetyl attached to the ring). Named as a phenyl ketone, the compound is ethanone with a (3-nitrophenyl) group, giving 1-(3-nitrophenyl)ethanone. Alternatively, it can be named as 3'-nitroacetophenone, but the IUPAC name is 1-(3-nitrophenyl)ethanone. Step 5 - No other options are present to eliminate, as this is a naming/identification question with a single structure. Therefore, the correct answer is 1-(3-nitrophenyl)ethanone.