Which of the following reactions cannot be us | vedclass

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

Question

(A) In aryl halides $(ArX)$,the halogen atom is attached to the benzene ring through a $C-X$ bond that has partial double bond character due to resona

Vedclass · Accepted Answer

$ArX + KCN$

Vedclass · Answer

(A) In aryl halides $(ArX)$,the halogen atom is attached to the benzene ring through a $C-X$ bond that has partial double bond character due to resonance. This makes the $C-X$ bond shorter and stronger,making nucleophilic substitution by $CN^-$ ions extremely difficult under normal conditions. Therefore,the reaction $ArX + KCN$ does not proceed to form $ArCN$. Other reactions provided are standard methods: $ArN_2^+Cl^- + CuCN 	o ArCN + N_2 + CuCl$ (Sandmeyer reaction). $ArCONH_2 + P_2O_5 	o ArCN + H_2O$ (Dehydration). $ArCONH_2 + SOCl_2 	o ArCN + SO_2 + 2HCl$ (Dehydration).

Which of the following reactions cannot be used to prepare an aromatic nitrile $(ArCN)$?

Similar Questions

The compound $A$ is formed by the reaction of benzotrichloride with $Br_2$ in the presence of $Fe$. Identify the compound $A$.

Which of the following groups is an ortho and para directing group?

What is the product of the reaction between nitrobenzene and $CH_3Cl$ in the presence of anhydrous $AlCl_3$?

The highest yield of $m-$ product is possible by the electrophilic substitution of the following:

The Fittig reaction is:

Vedclass Test Series

Exam Paper Generator

Online Exam Module