Chemistry - Nomenclature Question with Solution | TestHub

The principal functional group is the carboxylic acid (-COOH), so the parent chain is the longest chain that includes it, and numbering starts from the end that gives it the lowest locant. Substituents and multiple bonds are then placed with their locants, and prefixes are written in alphabetical order. Name: 3-(cyclopenta-2,4-dien-1-yl)-2-methylhexanoic acid. The other options use wrong numbering, the wrong alphabetical order or the wrong parent chain.