Let be the sum of the locant numbers for the correct IUPAC numbering of the compound: . What is ? — IUPAC and Nomenclature Chemistry Question

💡 Solution & Explanation

The longest chain is a hexane (6 carbons). Numbering from left to right gives substituents at positions 2, 2, 4. Numbering from right to left gives substituents at 3, 5, 5. Comparing the locant sets, (2, 2, 4) is lower than (3, 5, 5). The sum of these locants is $2 + 2 + 4 = 8$.