The increasing order of the rate of nucleophi | vedclass

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

Question

(B) The rate of nucleophilic aromatic substitution is increased by the presence of electron-withdrawing groups $(EWG)$ on the benzene ring,as they sta

Vedclass · Accepted Answer

$II < I < III < IV$

Vedclass · Answer

(B) The rate of nucleophilic aromatic substitution is increased by the presence of electron-withdrawing groups $(EWG)$ on the benzene ring,as they stabilize the intermediate carbanion (Meisenheimer complex).$II$ has a $-OCH_3$ group,which is an electron-donating group $(EDG)$ via resonance,thus it decreases the rate of nucleophilic substitution compared to chlorobenzene $(I)$.$III$ has one $-NO_2$ group (a strong $EWG$),which increases the rate compared to $I$.$IV$ has two $-NO_2$ groups,which further increase the rate compared to $III$.Therefore,the increasing order of reactivity is: $II < I < III < IV$.

The increasing order of the rate of nucleophilic substitution reaction for the following compounds is:

Similar Questions

Which of the following shows the fastest rate of hydrolysis?

Assertion : The presence of nitro group facilitates nucleophilic substitution reactions in aryl halides.
Reason : The intermediate carbanion is stabilized due to the presence of nitro group.

The following transformation proceeds through:

The chemicals used for preparing acetophenone via Friedel-Crafts acylation are:
$(A)$ $C_6H_6$
$(B)$ $CH_3COCH_3$
$(C)$ $CH_3COCl$
$(D)$ Anhydrous $AlCl_3$

Oxidation of toluene with dilute $HNO_3$ gives:

Vedclass Test Series

Exam Paper Generator

Online Exam Module