What is Etard reaction with example?

The Étard reaction is a chemical reaction that involves the direct oxidation of an aromatic or heterocyclic bound methyl group to an aldehyde using chromyl chloride. For example, toluene can be oxidized to benzaldehyde. It is named for the French chemist Alexandre Léon Étard (5 January 1852, Alençon – 1 May 1910).

What is the reaction involved in Etard reaction?

Etard reaction: Chromyl chloride (CrO2Cl2) oxidises methyl group to a chromium complex, which on hydrolysis gives corresponding benzaldehyde. This reaction is called Etard reaction.

Which reagent is used in Etard reaction?

Chromyl chloride
In the Etard reaction, we need a compound which has at least one methyl group bonded to a benzene ring. This methyl group is then oxidized to make an aldehyde. This is done by using a mild oxidant. Therefore, we use Chromyl chloride which is a chromium-based mild oxidizing agent.

Is Etard reaction important?

Etard reaction is one of the important name reactions of CBSE Class XII Chemistry. Benzaldehyde can be prepared using toluene by etard reaction. Benzaldehyde is an important organic compound which is highly used in the food industry in place of almonds due to its almond-like flavor.

Which is an example of the Etard reaction?

Named to honour the French scientist Alexandre Leon Etard, the reaction details the oxidation of aromatic methyl groups or heterocyclic bound methyl groups to an aldehyde using chromyl chloride. For example, Toluene can be oxidized to Benzaldehyde using the Etard reaction as shown below:

How is the precipitate of the Etard complex decomposed?

The precipitated Etard complex is decomposed (Purification of the precipitate before decomposition gives highly pure aldehyde product) by a [2,3] Sigmatropic Rearrangement (A pericyclic reaction where the end result is that one Sigma bond is changed to another sigma bond via an uncatalyzed intramolecular process).

What kind of solvent is used in Etard reaction?

Carbon tetrachloride is the most common solvent used in this process. This reaction provides a very easy method for the oxidation of toluene to benzaldehyde which is utilized to add an almond flavour to foods and some cosmetic products, making it a valuable chemical.