Which of the following aldehydes does not giv | vedclass

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Question

(D) The Cannizzaro reaction is a characteristic reaction of aldehydes that do not possess any $\alpha$-hydrogen atoms. $1$. $HCHO$ (Formaldehyde) has

Vedclass · Accepted Answer

$CH_3CH_2CHO$

Vedclass · Answer

(D) The Cannizzaro reaction is a characteristic reaction of aldehydes that do not possess any $\alpha$-hydrogen atoms. $1$. $HCHO$ (Formaldehyde) has no $\alpha$-hydrogen. $2$. $CCl_3CHO$ (Trichloroacetaldehyde) has no $\alpha$-hydrogen. $3$. Benzaldehyde $(C_6H_5CHO)$ has no $\alpha$-hydrogen. All of the above compounds undergo the Cannizzaro reaction. $4$. Propanal $(CH_3CH_2CHO)$ contains two $\alpha$-hydrogen atoms attached to the $\alpha$-carbon. Therefore, it undergoes aldol condensation in the presence of a dilute base, not the Cannizzaro reaction. Thus, the correct answer is $CH_3CH_2CHO$.

Which of the following aldehydes does not give the Cannizzaro reaction?

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(Image shows the reduction of a ketone group to a secondary alcohol in the presence of an ester group)

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