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JAMB Chemistry 1998 Question 41

Question 41

Introduction to Organic Chemistry

CH3CH2CH(OH)CH(CH3)2
The IUPAC nomenclature for the above compound is

  1. A.4-methylpentan-3-ol
  2. B.2-methylpentan-3-ol
  3. C.3-methylpentan-3-ol
  4. D.1, 1-dimethylbutan-2-ol
Show the answer and explanation

Answer: B (2-methylpentan-3-ol)

Explanation

The longest chain has five carbons with OH on C3 from either end. Numbering to give the methyl branch the lower number puts it on C2: 2-methylpentan-3-ol.