See image — IUPAC and Nomenclature Chemistry Question

💡 Solution & Explanation

Step 1: Identify the parent structure. The molecule consists of a benzene ring with a substituent chain attached directly to it. Step 2: Count the carbons in the alkyl chain. Starting from the carbon attached to the benzene ring, count the chain: C1-C2-C3-C4-C5-C6-C7-C8, giving 8 carbons total. Step 3: Name the alkyl group. An 8-carbon straight-chain alkyl group is called 'octyl'. Step 4: Combine the substituent name with the parent 'benzene'. When a benzene ring bears an octyl substituent, the compound is named by placing the alkyl group name before 'benzene'. An 8-carbon straight chain attached to benzene gives octylbenzene. Step 5: Verify no other substituents or branching exist. The chain is unbranched and there is only one substituent on the ring, confirming the name is simply octylbenzene. Therefore, the correct answer is octylbenzene.