Number of CO_2 molecules evolved upon heating | vedclass

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(B) The given compound contains multiple carboxylic acid groups. Upon heating,gem-dicarboxylic acids (two $-COOH$ groups on the same carbon) undergo d

Vedclass · Accepted Answer

$2$

Vedclass · Answer

(B) The given compound contains multiple carboxylic acid groups. Upon heating,gem-dicarboxylic acids (two $-COOH$ groups on the same carbon) undergo decarboxylation to release $CO_2$. $1$. The carbon atom with two $-COOH$ groups at the top right undergoes decarboxylation,releasing $1$ molecule of $CO_2$. $2$. The carbon atom with two $-COOH$ groups at the bottom right is adjacent to a carbonyl group (a $\beta$-keto acid derivative). This carbon also undergoes decarboxylation,releasing $1$ molecule of $CO_2$. $3$. The single $-COOH$ group at the top left is not a gem-dicarboxylic acid nor a $\beta$-keto acid,so it does not undergo decarboxylation under these conditions. Thus,a total of $2$ molecules of $CO_2$ are evolved.

Number of $CO_2$ molecules evolved upon heating the given compound.

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