Let's analyze the step-by-step. --- # Step 1: Identify the molecules - **First molecule:** It a benzene ring with methyl groups attachedat positions , 3, 5). -Second molecule:** It is a long with a cyclopentane (-membered ring) attached to a alkyl chain. --- # Step2: Determine the parent structures based on the cyclic part ### the first molecule: - The cyclic part isbenzene**a six-member aromatic ring). ### For the second: - The part is **cyclopentane** (a five-membered saturated ring). --- # Step 3: Naming based on the cyclic part (cyclic parent) ### First molecule: - **Cyclic part:** Benzene - **Substituents:** Three methyl groups at positions 1, 3, and 5 (since they are attached to the benzene ring). - **Name:** **Trimethylbenzene** - **Specific isomer:** Because the methyl groups are at positions 1, 3, and 5, the compound is **1,3,5-Trimethylbenzene**. ### Second molecule: - **Cyclic part:** Cyclopentane - **Substituents:** A long chain attached to the cyclopentane ring. - **Name:** The cyclic part is **cyclopentane**. --- # Step 4: Naming based on the linear part (linear chain attached) - The linear chain attached to the cyclopentane is **a pentyl chain** (a chain with 5 carbons). - The chain is attached via one of its terminal carbons. --- # **Final Names:** ### For the first molecule: **Using the cyclic part as parent:** **1,3,5-Trimethylbenzene** ### For the second molecule: **Using the cyclic part as parent:** **Cyclopentane** with a pentyl group attached, so the name is: **Pentylcyclopentane** --- # **Summary** | Molecule | Cyclic part (parent) | Linear part (attached) | Name (using cyclic as parent) | |------------|------------------------|------------------------|------------------------------| | 1st | Benzene | Trimethyl group | **1,3,5-Trimethylbenzene** | | 2nd | Cyclopentane | Pentyl group | **Pentylcyclopentane** | --- Let me know if you'd like further clarification!