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Cannizzaro's reaction is not given by...

Cannizzaro's reaction is not given by

A

B

C

HCHO

D

`CH_(3)CHO`

Text Solution

Verified by Experts

The correct Answer is:
D

Necessary condition for Cannizzaro reaction is absence of `alpha`-hydrogen atom. So, `CH_(3)CHO` will not give Cannizzaro reaction while other three compounds have no `alpha`-hydrogen. Hence, they will give Cannizzaro reaction.
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A : In crossed Cannizzaro's reaction in between HCHO and C_(6)H_(5)CHO , HCHO is oxidised. R : OH^(-) firstly attacks on HCHO. So, HCHO is oxidised.

Aldehydes undergo disproportionation reaction in presence of aqueous NaOH. Simultaneou oxidation and reduction of a compound is scientifically called as disproportionation. Aldehydes having no alpha -hydrogen show this rection called Cannizzaro's reaction. Few exception are also there to this represented as : C_(6)H_(5)CHO+C_(6)H_(5)CHO overset(NaOH)underset(Delta)to C_(6)H_(5)COONa+C_(6)H_(5)CH_(2)OH Intramolecular Cannizzaro's reaction is also possible. Answer the following questions : The aldehyde which shows Cannizzaro's reaction is :

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Which of the statements are correct about the internal or intramolecular Cannizzaro reaction given below ?

In the Cannizzaro reaction given below: 2Ph-CHO overset(overset(Θ)OH)rarrPh-CH_(2)OH+PhCO_(2)^(-) the slowest step is: