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प्रश्न
Explain the following reaction:
Cannizzaro reaction
Explain the following reaction and write the chemical equation involved:
Cannizzaro reaction
Explain Cannizzaro reaction with suitable exnmple.
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उत्तर
Aldehydes, which do not contain an α-hydrogen atom, undergo self-oxidation and reduction (disproportionation) reaction on heating with concentrated alkali (NaOH/KOH) to form an alcohol and a carboxylic acid salt.
\[\ce{\underset{Benzaldehyde}{2C6H5CHO} + NaOH -> \underset{Benzyl alcohol}{C6H5CH2OH} + \underset{Sodium benzoate}{C6H5COONa}}\]
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संबंधित प्रश्न
Write a note on the self oxidation-reduction reaction of an aldehyde with a suitable example.
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\[\begin{array}{cc}
\ce{D}\phantom{........................}\\
|\phantom{.........................}\\
\ce{2D - C = O + OH^- ->[Cannizzaro] X and Y}
\end{array}\]
(Y is alcohol, D is deuterium)
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\[\ce{2Ph-CHO ->[OH^-] Ph-CH2OH + PhC\overset{-}{O}_2}\]
the slowest step is:
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