Question

Consider the following sequence of reactions:

The product 'B' is

• A.

  

• B.

  

• C.

  

• D.

  

Hint:

Azo compounds are formed when diazonium salts react with electron-donating aro matic compounds.

Answer 1

The Correct Option is C

Diazotization and Azo Compound Formation 

Step-by-Step Reaction:

1. Diazotization:
   • An aromatic amine (\( Ar−NH_2 \)) reacts with sodium nitrite (\( NaNO_2 \)) and hydrochloric acid (\( HCl \)) at 0−5°C.
   • This forms a diazonium salt (\( Ar−N_2^+Cl^- \)).
2. Electrophilic Substitution:
   • The diazonium salt reacts with \( N,N \)-dimethylaniline via electrophilic substitution.
   • This forms an azo compound (\( Ar−N=N−N(CH_3)_2 \)).

Final Product:

The final product is an azo compound: \( Ar−N=N−N(CH_3)_2 \).