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The oxidation of aryl methyl or cyclo al...

The oxidation of aryl methyl or cyclo alkyl methyl by the treatment with chromyl chloride to an aldehyde via the formation of esters is known as Etard reaction. The oxidation stops at aldehyde stage because the product of the reaction is acylal, `R - CH(OCOCH_3)_2` which is resistance to oxidation with this reagent. The acylal on hydrolysis gives aldehyde.

What is the product obtained when ethyl benzene is subjected to Etard reaction ?

A

Methyl phenyl ketone

B

2 - Phenyl ethanal

C

Benzoic acid

D

2-Phenyl ethanoic acid

Text Solution

Verified by Experts

The correct Answer is:
B
In case the side chain contains group higher than `-CH_3` group the end carbon atom of the chain is oxidized by `CrO_2 Cl_2`
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The oxidation of aryl methyl or cyclo alkyl methyl by the treatment with chromyl chloride to an aldehyde via the formation of esters is known as Etard reaction. The oxidation stops at aldehyde stage because the product of the reaction is acylal, R - CH(OCOCH_3)_2 which is resistance to oxidation with this reagent. The acylal on hydrolysis gives aldehyde. Which of the other reactions will produce benzaldehyde ?

The oxidation of aryl methyl or cyclo alkyl methyl by the treatment with chromyl chloride to an aldehyde via the formation of esters is known as Etard reaction. The oxidation stops at aldehyde stage because the product of the reaction is acylal, R - CH(OCOCH_3)_2 which is resistance to oxidation with this reagent. The acylal on hydrolysis gives aldehyde. Which of the following compounds give benzo-phenone upon treating with Cr O_2 Cl_2 ?

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