Question:
Which is the reaction product of phthalic anhydride and sec-Butyl alcohol?
Which is the reaction product of phthalic anhydride and sec-Butyl alcohol?
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Anhydride + Alcohol $\rightarrow$ Half-ester (Monoester).
Updated On: May 28, 2026
- sec-Butyl hydrogen phthalate
- Sec-Butyl benzoic acid
- sec-Butyl benzoyl benzoic acid
- sec-Butyl phthaloyl phthalate
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The Correct Option is A
Solution and Explanation
Step 1: Concept
The reaction of an acid anhydride with an alcohol typically produces a monoester.
Step 2: Meaning
Phthalic anhydride is a cyclic anhydride; reacting it with one equivalent of alcohol opens the ring to form a half-ester.
Step 3: Analysis
sec-Butyl alcohol acts as the nucleophile, attacking one of the carbonyl carbons of the phthalic anhydride, resulting in a product that contains one ester group and one free carboxylic acid group.
Step 4: Conclusion
The resulting compound is sec-Butyl hydrogen phthalate.
Final Answer: (A)
The reaction of an acid anhydride with an alcohol typically produces a monoester.
Step 2: Meaning
Phthalic anhydride is a cyclic anhydride; reacting it with one equivalent of alcohol opens the ring to form a half-ester.
Step 3: Analysis
sec-Butyl alcohol acts as the nucleophile, attacking one of the carbonyl carbons of the phthalic anhydride, resulting in a product that contains one ester group and one free carboxylic acid group.
Step 4: Conclusion
The resulting compound is sec-Butyl hydrogen phthalate.
Final Answer: (A)
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