Question

Which of the following compounds has wrong IUPAC name?

• A. \(\text{CH}_3-\text{CH}_2-\text{CH}_2-\text{COO}-\text{CH}_2\text{CH}_3 \rightarrow\) Ethyl butanoate
• B. \(\text{CH}_3-\text{CH}(\text{CH}_3)-\text{CH}_2-\text{CHO} \rightarrow}\) 3-Methylbutanal
• C. \(\text{CH}_3-\text{CH(OH)}-\text{CH}(\text{CH}_3)-\text{CH}_3 \rightarrow\) 2-Methyl-3-butanol
• D. \(\text{CH}_3-\text{CH}(\text{CH}_3)-\text{CO}-\text{CH}_2-\text{CH}_3 \rightarrow\) 2-Methyl-3-pentanone

Hint:

Functional group must receive the lowest numbering in IUPAC nomenclature.

Answer 1

The Correct Option is C

Step 1: Alcohol group gets lowest possible locant.
Step 2: Correct name should be 3-Methyl-2-butanol, not 2-Methyl-3-butanol.