Which of the following represents the correct IUPAC name for the compounds concerned ? (a) 2, 2-Dimethylpentane or 2-Dimethylpentane (b) 2, 4, 7-Trimethyloctane or 2, 5, 7-Trimethyloctane (c) 2-Chloro-4-methylpentane or 4-Chloro-2-methylpentane (f) But-3-yn-1-ol or But-4-ol-1-yne.

Which of the following represents the correct IUPAC name for the compo

1.	Which of the following represents the correct IUPAC name for the compounds concerned ? (a) 2, 2-Dimethylpentane or 2-Dimethylpentane (b) 2, 4, 7-Trimethyloctane or 2, 5, 7-Trimethyloctane (c) 2-Chloro-4-methylpentane or 4-Chloro-2-methylpentane (f) But-3-yn-1-ol or But-4-ol-1-yne.
Answer» SOLUTION :(a) 2, 2-Dimethylpentane. For TWO ALKYL groups on the same carbon its locant is repeated twice, (b) 2, 4, 7-Trimethyloctane since 2, 4, 7-locant SET is lower than 2, 5, 7. (c)2-Chloro-4-methylpentane. Alphabetical order of substituents. (d) But-3-yn-1-ol. Lower locant for the principle functional group i.e., alcohol.