Which dicarboxylic acid,in the presence of a | vedclass

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(A) The formation of cyclic anhydrides from dicarboxylic acids depends on the stability of the resulting ring. Five-membered and six-membered rings ar

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(A) The formation of cyclic anhydrides from dicarboxylic acids depends on the stability of the resulting ring. Five-membered and six-membered rings are generally stable and form easily. $1$. Succinic acid forms a $5$-membered anhydride (succinic anhydride). $2$. Phthalic acid forms a $5$-membered cyclic anhydride. $3$. Cyclopentane-$1,2$-dicarboxylic acid (cis-isomer) forms a $5$-membered fused anhydride. $4$. Adipic acid $(HOOC(CH_2)_4COOH)$ would form a $7$-membered ring anhydride,which is highly unstable due to ring strain and transannular interactions. Therefore,it is the least reactive toward anhydride formation.

Which dicarboxylic acid,in the presence of a dehydrating agent,is least reactive to form an anhydride?

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