JEE Main · 2019 · Shift-IeasyGOC-114

The IUPAC name of the following compound is

General Organic Chemistry (GOC) · Class 11 · JEE Main Previous Year Question

Question

The IUPAC name of the following compound is image

Options
  1. a

    4,4 - dimethyl -3-hydroxybutanoic acid

  2. b

    2-methyl-3-hydroxypentan-5-oic acid

  3. c

    3- hydroxy -4- methylpentanoic acid

    ✓
  4. d

    4-methyl-3-hydroxypentanoic acid

Correct Answerc

3- hydroxy -4- methylpentanoic acid

Detailed Solution

Step 1: Identifying the Parent Chain The longest chain containing the carboxyl group (−\ceCOOH-\ce{COOH}) has 5 carbons: Pentanoic acid.

  • Step 2: Numbering C1C1 is the carbonyl carbon: C1(OOH)−C2−C3(OH)−C4(CH3)−C5C1(OOH)-C2-C3(OH)-C4(CH3)-C5.
  • Step 3: Naming Substituents
  • C3 has a hydroxyl group (3-hydroxy).
  • C4 has a methyl group (4-methyl).

Step 4: Conclusion Name: 3-hydroxy-4-methylpentanoic acid.

Answer: (c) 3-hydroxy-4-methylpentanoic acid\boxed{\text{Answer: (c) 3-hydroxy-4-methylpentanoic acid}}

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