Benzaldehyde condenses with N,N-dimethylanili | vedclass

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Question

(C) The reaction of benzaldehyde with two equivalents of $N,N$-dimethylaniline in the presence of anhydrous $ZnCl_2$ (a Lewis acid catalyst) leads to

Vedclass · Accepted Answer

Malachite green

Vedclass · Answer

(C) The reaction of benzaldehyde with two equivalents of $N,N$-dimethylaniline in the presence of anhydrous $ZnCl_2$ (a Lewis acid catalyst) leads to a condensation reaction.This reaction produces a leuco base,which upon oxidation yields the triphenylmethane dye known as Malachite green.The reaction is represented as:$C_6H_5CHO + 2 C_6H_5N(CH_3)_2 \xrightarrow{ZnCl_2} C_6H_5CH[C_6H_4N(CH_3)_2]_2 + H_2O$Thus,the correct option is $(C)$.

Benzaldehyde condenses with $N,N$-dimethylaniline in the presence of anhydrous $ZnCl_2$ to give:

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