Which of the following compounds is the most | vedclass

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

Question

(A) The acidity of substituted benzoic acids is determined by the electronic effects of the substituent group attached to the benzene ring. Electron-w

Vedclass · Accepted Answer

$p$-Nitrobenzoic acid

Vedclass · Answer

(A) The acidity of substituted benzoic acids is determined by the electronic effects of the substituent group attached to the benzene ring. Electron-withdrawing groups $(EWG)$ increase acidity by stabilizing the carboxylate anion through inductive $(-I)$ and resonance $(-M)$ effects. Electron-donating groups $(EDG)$ decrease acidity by destabilizing the carboxylate anion through inductive $(+I)$ and resonance $(+M)$ effects. The substituents are: $1$. $-NO_2$: Strong $-I$ and $-M$ effect (Strongly electron-withdrawing). $2$. $-CH_3$: $+I$ and hyperconjugation effect (Electron-donating). $3$. $-CN$: $-I$ and $-M$ effect (Electron-withdrawing,but weaker than $-NO_2$). $4$. $-OCH_3$: $-I$ effect but strong $+M$ effect (Overall electron-donating). Since the $-NO_2$ group is the strongest electron-withdrawing group among the given options,$p$-nitrobenzoic acid is the most acidic compound.

Which of the following compounds is the most acidic?

Similar Questions

Benzamide on reaction with $POCl_3$ gives

The $pK_a$ values of four carboxylic acids are given below. Identify the weakest carboxylic acid.

The role of conc. $H_2SO_4$ in the esterification process is

What is the correct order of acidity of compounds $(I)$,$(II)$,and $(III)$?
$(I)$ $4$-Nitrobenzoic acid
$(II)$ $4$-Methoxybenzoic acid
$(III)$ Benzoic acid

Aspirin is an acetylation product of

Vedclass Test Series

Exam Paper Generator

Online Exam Module