Assertion (A) : Chlorobenzene is less reactive towards nucleophilic substitution reaction.
Assertion (A) : Chlorobenzene is less reactive towards nucleophilic substitution reaction.
Reason (R) : Nitro group in chlorobenzene increases its reactivity towards nucleophilic substitution reaction.
(A) Both A and R are true and R is the correct explanation of A.
(B) Both A and R are true and R is not the correct explanation of A.
(C) A is true but R is false.
(D) A is false but R is true.
1 Answers
Option : (B) Both A and R are true and R is not the correct explanation of A.
Chlorobenzene is less reactive towards nucleophilic substitution reaction due to the delocalization of the electrons of C-Cl bond and a partial double bond character develop in the bond which make it difficult for nucleophile to cleave C-Cl bond.
When Nitro group present at ortho and para position it withdraw electrons from benzene ring and helps to attack of Nucleophiles on haloarene. that's why. Nucleophilic Substitution increases.