See image — IUPAC and Nomenclature Chemistry Question

💡 Solution & Explanation

Step 1: Identify the parent structure. The image shows a triangular ring composed of three carbon atoms, which is a cyclopropane ring. Step 2: Identify the substituent. Attached directly to one carbon of the cyclopropane ring is a -CO2H (carboxylic acid) group. Step 3: Name the compound using IUPAC nomenclature. The parent chain is cyclopropane. The principal functional group is the carboxylic acid (-COOH), which is indicated by the suffix '-carboxylic acid' when the -COOH carbon is not part of the ring. Since the -CO2H is attached as a substituent to the cyclopropane ring (the carboxyl carbon is exocyclic), the compound is named cyclopropanecarboxylic acid (also written as cyclopropane carboxylic acid). Step 4: No other options are present to eliminate. The structure unambiguously depicts a three-membered carbocyclic ring bearing a carboxylic acid group, giving the name cyclopropane carboxylic acid. Therefore, the correct answer is cyclopropane carboxylic acid.