The reaction shown below is an example of Nuc | vedclass

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

Question

(A) In Nucleophilic Aromatic Substitution $(S_NAr)$ reactions,the rate-determining step is the attack of the nucleophile on the aromatic ring to form

Vedclass · Accepted Answer

$-F$

Vedclass · Answer

(A) In Nucleophilic Aromatic Substitution $(S_NAr)$ reactions,the rate-determining step is the attack of the nucleophile on the aromatic ring to form a Meisenheimer complex. In this specific mechanism,the electronegativity of the halogen atom plays a crucial role. Since the fluorine atom is the most electronegative,it exerts the strongest $-I$ (inductive) effect,which significantly stabilizes the transition state (the carbanion intermediate) by withdrawing electron density from the ring. Therefore,the reactivity order for nucleophilic aromatic substitution is $F > Cl > Br > I$. Thus,the $-F$ atom is the most readily replaced.

The reaction shown below is an example of Nucleophilic Aromatic Substitution. Which of the following halides $(-X)$ is most readily replaced?

Similar Questions

An equimolar mixture of toluene and chlorobenzene is treated with a mixture of conc. $H_{2}SO_{4}$ and conc. $HNO_{3}$. Indicate the correct statement from the following.

The above reaction requires which of the following reaction conditions?

The order of dipole moment for $o-, p-,$ and $m-$dichlorobenzene is............

Assertion : Cyanide $(CN^{-})$ is a strong nucleophile.
Reason : Benzonitrile is prepared by the reaction of chlorobenzene with potassium cyanide.

Which of the following substituents on benzene is ortho-para directing in electrophilic substitution and ortho-para directing in nucleophilic substitution?

Vedclass Test Series

Exam Paper Generator

Online Exam Module