See image — IUPAC and Nomenclature Chemistry Question

💡 Solution & Explanation

Step 1 - Identify the functional group: The structure shows a benzene ring directly attached to a -C(=O)Cl group. The C=O with a Cl attached constitutes an acid chloride (acyl chloride) functional group. Step 2 - Identify the parent structure: The benzene ring (phenyl group, C6H5-) is the aromatic parent. When benzoic acid (C6H5COOH) loses the -OH and gains -Cl, it forms an acid chloride. Step 3 - Naming the compound: Acid chlorides derived from carboxylic acids are named by replacing the '-ic acid' ending with '-yl chloride'. Benzoic acid → benzoyl chloride. The compound C6H5COCl is thus named benzoyl chloride. Step 4 - Confirm: The carbonyl carbon is directly bonded to the phenyl ring on one side and a chlorine atom on the other side, with a double bond to oxygen. This is precisely the structure of benzoyl chloride (also called benzene carbonyl chloride or phenyl carbonyl chloride). Therefore, the correct answer is benzoyl chloride.