Question

Which is the Claisen condensation product of ethyl propanoate?
A.

B.

C.

D.

Answer 1

To solve this question, we must first briefly discuss the mechanism and types of products formed in Claisen condensation reaction. Then we must proceed with these steps and try to form the product from the reactant given to us.

Complete Step-by-Step Answer:
Before we move forward with the solution of the given question, let us first understand some important basic concepts.
The Claisen condensation reaction basically involves the formation of an ester which has ketone functional groups present at the pre – terminal carbon or the beta -carbon atom. Hence, the product formed in Claisen condensation reactions is known as $\beta$ - keto esters or $\beta$ - diketone. The Claisen condensation reaction involves the reaction of two esters which undergo a coupling reaction, which eliminates the alkoxy group from one ester and an alpha hydrogen from the other ester. This results in the formation of a new $C - C$ bond, between the two reacting compounds. It also results in the formation of alcohol from the eliminated alkoxy group. The catalysts used in this reaction are sodium alginate and hydronium ions.
The ester given to us in the question is ethyl propanoate, and it is made to undergo self – condensation. The chemical equation for the same can be given as:

Hence, Option A is the correct option

Note: There are 3 main types of Claisen condensation reactions. The first type includes the self – condensation between two molecules of the same ester. The second type includes two different esters, which may contain similar or different alkyl groups.