What is the correct sequence of reagents used for converting nitrobenzene into m -dibromobenzene?

What is the correct sequence of reagents used for converting nitrobenzene into m-dibromobenzene?

  1. →Sn/HCl/→KBr/→Br2/→H+
  2. →Br2/Fe/→Sn/HCl/→NaNO2/HCl/→CuBr/HBr
  3. →NaNO2/→HCl/→KBr/→H+
  4. →Sn/HCl/→Br2/→NaNO2/→NaBr

Solution

The process of conversion of primary aromatic amines into its diazonium salt is called diazotization. 

Diazonium salts are important synthetic intermediates that can undergo coupling reactions to form azo dyes and electrophilic substitution reactions to introduce functional groups.

The correct sequence of reagents used for converting nitrobenzene into m- dibromobenzene is found in option (b).

Asked in: JEE Main 2021 (24 Feb Shift 2)

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