Question:
Which of the following is structural formula of mesityl oxide?
Which of the following is structural formula of mesityl oxide?
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Remember Mesityl oxide = Acetone + Acetone minus Water.
Updated On: Apr 30, 2026
- \( (CH_{3})_{2}CH - CH = CH - CO - CH_{3} \)
- \( (CH_{3})_{2}C = CH - CO - CH_{3} \)
- \( (CH_{3})_{3}C - CH = CH - CO - CH_{3} \)
- \( (CH_{3})_{2}CH - CH = CH - CO - CH(CH_{3})_{2} \)
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The Correct Option is B
Solution and Explanation
Step 1: Concept
Mesityl oxide is an $\alpha,\beta$-unsaturated ketone formed by the aldol condensation of acetone followed by dehydration.
Step 2: Formation
$2 \times \text{Acetone} \xrightarrow{Ba(OH)_2} \text{Diacetone alcohol} \xrightarrow{\Delta, -H_2O} \text{Mesityl oxide}$.
Step 3: Structure Identification
IUPAC Name: 4-methylpent-3-en-2-one.
Structure: $(CH_3)_2C=CH-C(=O)CH_3$.
Step 4: Conclusion
Option (B) represents the correct structure.
Final Answer:(B)
Mesityl oxide is an $\alpha,\beta$-unsaturated ketone formed by the aldol condensation of acetone followed by dehydration.
Step 2: Formation
$2 \times \text{Acetone} \xrightarrow{Ba(OH)_2} \text{Diacetone alcohol} \xrightarrow{\Delta, -H_2O} \text{Mesityl oxide}$.
Step 3: Structure Identification
IUPAC Name: 4-methylpent-3-en-2-one.
Structure: $(CH_3)_2C=CH-C(=O)CH_3$.
Step 4: Conclusion
Option (B) represents the correct structure.
Final Answer:(B)
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