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Certain dicarboxylic acids spontaneousl...

Certain dicarboxylic acids spontaneously eliminate water when heated forming cycioc anhydirides. But for the reaction to be successfully. The cyclic anhydrides product must normally have a ring size of fivee or six members. There are two important reasons, first, the second carboxyl group can serve as the acid catalyst (by intramolecular proton transfer), as well as the nucleophile. And second, the high temperature involved reduce the need for catalyst.

Which of the following dicarboxylic acid would you expect to form cyclic anhydride?

A

B

C

D

Text Solution

Verified by Experts

The correct Answer is:
C
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Certain dicarboxylic acids spontaneously eliminate water when heated forming cycioc anhydirides. But for the reaction to be successfully. The cyclic anhydrides product must normally have a ring size of fivee or six members. There are two important reasons, first, the second carboxyl group can serve as the acid catalyst (by intramolecular proton transfer), as well as the nucleophile. And second, the high temperature involved reduce the need for catalyst. Which of the following dicarboxylic acid will not for cyclic anhydrides?

Certain dicarboxylic acids spontaneously eliminate water when heated forming cycioc anhydirides. But for the reaction to be successfully. The cyclic anhydrides product must normally have a ring size of fivee or six members. There are two important reasons, first, the second carboxyl group can serve as the acid catalyst (by intramolecular proton transfer), as well as the nucleophile. And second, the high temperature involved reduce the need for catalyst. Consider the following sequence of reaction, The final product of the reaction would be

Name the following: Second member of carboxylic acid.

Which of the following intermediates are involved in the acid catalyzed esterification of carboxylic acid?

Why does not formic acid form an anhydride upon heating?

Knowledge Check

  • Which of the following organic acid decolourises bromine water as well as forms anhydride ?

    A
    `HOOC - COOH`
    B
    `HOOC - CH_2 - COOH`
    C
    D

  • Carboxylic acid group can be detected by which test ?

    A
    Sodium bisulphite test
    B
    Fehling's solution test
    C
    Tollen's reagent
    D
    With `NaHCO_3`