The aldehydes which will not form a single Gr | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(A) Grignard reagents are strong bases as well as nucleophiles. They react with acidic protons (like those in $-COOH$ or $-OH$ groups) before reacting

Vedclass · Accepted Answer

$ (b), (d) $

Vedclass · Answer

(A) Grignard reagents are strong bases as well as nucleophiles. They react with acidic protons (like those in $-COOH$ or $-OH$ groups) before reacting with the carbonyl group.$(a)$ Benzaldehyde has no acidic protons,so $1$ equivalent of Grignard reagent reacts with the aldehyde group.$(b)$ $4$-Formylbenzoic acid contains an acidic $-COOH$ group. It consumes $1$ equivalent of Grignard reagent for acid-base reaction and another for the aldehyde,totaling $2$ equivalents.$(c)$ $4$-Methoxybenzaldehyde has no acidic protons,so $1$ equivalent reacts with the aldehyde group.$(d)$ $4$-(Hydroxymethyl)benzaldehyde contains an acidic $-OH$ group. It consumes $1$ equivalent for acid-base reaction and another for the aldehyde,totaling $2$ equivalents.Thus,compounds $(b)$ and $(d)$ will not form a single Grignard product with only $1$ equivalent of reagent.

The aldehydes which will not form a single Grignard product with one equivalent of Grignard reagent are:
$(a)$ Benzaldehyde
$(b)$ $4$-Formylbenzoic acid
$(c)$ $4$-Methoxybenzaldehyde
$(d)$ $4$-(Hydroxymethyl)benzaldehyde

Similar Questions

The solution of Fehling $B$ contains . . . . . . .

The major product $(P)$ in the following reaction sequence is:

What are $X$ and $Y$ in the following reaction sequence?
$Toluene$ $\xrightarrow{X} Benzaldehyde$ $\xrightarrow{HNO_3 + H_2SO_4, 273-283 \ K} Y$

Which of the following is most reactive for a nucleophilic addition reaction?

Which of the following compounds would undergo Cannizzaro's reaction?

Vedclass Test Series

Exam Paper Generator

Online Exam Module

The aldehydes which will not form a single Grignard product with one equivalent of Grignard reagent are:$(a)$ Benzaldehyde$(b)$ $4$-Formylbenzoic acid$(c)$ $4$-Methoxybenzaldehyde$(d)$ $4$-(Hydroxymethyl)benzaldehyde