JEE Main · 2021 · Shift-IeasyGOC-497

Mesityl oxide is a common name of:

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

Question

Mesityl oxide is a common name of:

Options
  1. a

    2,4-Dimethylpentan-3-one

  2. b

    3-Methylcyclohexanecarbaldehyde

  3. c

    2-Methylcyclohexanone

  4. d

    4-Methylpent-3-en-2-one

    ✓
Correct Answerd

4-Methylpent-3-en-2-one

Detailed Solution

image Answer: Option (d) — 4-Methylpent-3-en-2-one

Key Points to Remember:

  • Mesityl oxide = \ce(CH3)2C=CH−CO−CH3\ce{(CH3)_2C=CH-CO-CH3} = 4-methylpent-3-en-2-one
  • It is an α,β\alpha,\beta-unsaturated ketone (enone)
  • Formed by aldol condensation of acetone: \ce2CH3COCH3−>(CH3)2C=CHCOCH3+H2O\ce{2CH3COCH3 -> (CH3)_2C=CHCOCH3 + H2O}

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