The correct IUPAC name for a cyclopentane ring directly attached to a group is: — IUPAC and Nomenclature Chemistry Question

💡 Solution & Explanation

When a chain-terminating functional group like $-COOH$ is directly attached to an alicyclic ring, the ring itself is taken as the parent chain. The carbon of the $-COOH$ group cannot be included in the ring, so the special suffix "carboxylic acid" is used.