Find the position (locant number) of the complex substituent in the correct IUPAC name of the compou — IUPAC and Nomenclature Chemistry Question

💡 Solution & Explanation

The principal carbon chain contains 9 carbon atoms (nonane). The substituent is a 1-methylethyl (isopropyl) group attached to the central carbon. Numbering from either end of this symmetrical 9-carbon chain places the complex substituent strictly at carbon 5.