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Identify the most suitable reagent for converting benzene diazonium chloride to chlorobenzene.(a) CuCl2/HCl(b) Cu2Cl2/HCl(c) CuSO4/HCl(d) CuSO2/H2SO4The question was asked in an international level competition.Origin of the question is Diazonium Salts Chemical Reactions topic in portion Amines of Chemistry – Class 12

Answer»

Right answer is (B) Cu2Cl2/HCl

To EXPLAIN: The Cl^– nucleophile can be INTRODUCED in the benzene ring in the presence of Cu(I) ion which is produced by Cu2Cl2 in hydrochloric acid. This on warming with the DIAZONIUM salt will give chlorobenzene.



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