The number of aldehydes that undergo Cannizza | vedclass

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Question

(A) Aldehydes that do not have $\alpha$-hydrogens undergo the Cannizzaro reaction.$1$. Methanal $(HCHO)$: It has no $\alpha$-carbon,hence no $\alpha$-

Vedclass · Accepted Answer

$2$

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(A) Aldehydes that do not have $\alpha$-hydrogens undergo the Cannizzaro reaction.$1$. Methanal $(HCHO)$: It has no $\alpha$-carbon,hence no $\alpha$-hydrogen.$2$. Trichloro ethanal $(CCl_3CHO)$: The carbon adjacent to the carbonyl group is bonded to three chlorine atoms,so there is no $\alpha$-hydrogen.$3$. Phenyl ethanal $(C_6H_5CH_2CHO)$: It has two $\alpha$-hydrogens on the carbon attached to the phenyl ring.$4$. $2-$Methoxy propanal $(CH_3OCH(CH_3)CHO)$: It has one $\alpha$-hydrogen on the carbon at the $2-$position.Thus,only Methanal and Trichloro ethanal undergo the Cannizzaro reaction. The total number is $2$.

The number of aldehydes that undergo Cannizzaro reaction from the following are Phenyl ethanal,Methanal,$2-$Methoxy propanal,Trichloro ethanal.

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