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

Question

Which of the following dicarboxylic acids gives a cyclic anhydride on heating? (A) HOO ( CH 2)2 COOH (B) CH 2( COOH )2 (C) HOOC ( CH 2)4 COOH (D) HOOC ( CH 2)5 COOH

Tardigrade Admin · Accepted Answer

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

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

$H OO (C H_{2})_{2} COO H$

$C H_{2} (COO H)_{2}$

$H OOC (C H_{2})_{4} COO H$

$H OOC (C H_{2})_{5} COO H$

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

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

HOO(CH2​)2​COOH

CH2​(COOH)2​

HOOC(CH2​)4​COOH

HOOC(CH2​)5​COOH

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

$H OO (C H_{2})_{2} COO H$

$C H_{2} (COO H)_{2}$

$H OOC (C H_{2})_{4} COO H$

$H OOC (C H_{2})_{5} COO H$

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