Question

Which of the following isomer of 1, 2-cyclohexanedicarboxylic acid forms an hydride on heating?

• A.

  

• B.

  

• C.

  

• D. Reaction not possible

Hint:

In organic synthesis, heating dicarboxylic acids with suitable conditions often leads to intramolecular dehydration, forming cyclic anhydrides.

Answer 1

The Correct Option is B

Upon heating, certain isomers of 1, 2-cyclohexanedicarboxylic acid undergo dehydration and form cyclic anhydrides. The reaction proceeds by the elimination of water between the two carboxyl groups. In this case, Isomer 2 is the correct isomer that forms anhydride upon heating.