Starting from nitrobenzene how will you prepare benzene diazonium chloride ? Give the method of synthesis of (i) p-hydroxy azobenzene and (ii) fluorobenzene from benzene diazonium chloride.

Explanation

Benzene Diazonium Chloride from Nitrobenzene. Reduction of `C_6H_5.NO_2` by Sn/HCl give aniline, which on reaction with `NaNO_2+HCl` givs benzene diazonium chloride as follows :

(i) Sythesis of p-hydroxy Axobenzene from Benzene Diazonium Chloride