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  4. Which of the following dicarboxylic acids gives a cyclic anhydride on heating?

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Q. Which of the following dicarboxylic acids gives a cyclic anhydride on heating?

AMUAMU 2011Aldehydes Ketones and Carboxylic Acids

Solution:

Dicarboxylic acids with two or three intervening carbons, on heating alone at $573 \,K$ undergo dehydration to form anhydrides.

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