The yield in the Sandmeyer reaction is better than the Gattermann reaction for the introduction of halide or cyanide groups using diazonium salts.

The Sandmeyer reaction involves the displacement of nitrogen by Cl⁻, Br⁻, or CN⁻ in the presence of Cu(I) ion. The Gatterman reaction introduces chlorine or bromine into the benzene ring by treating the diazonium salt solution with the corresponding halogen ...

Reactions of diazonium salts are broadly categorized into two types: (A) reactions involving displacement of nitrogen and (B) reactions involving retention of the diazo group.

Benzoylation is a specific acylation reaction where amines react with benzoyl chloride (C₆H₅COCl). Pyridine, a base stronger than the amine, is used in acylation reactions to remove HCl formed during the reaction and shift the equilibrium towards the right.

Aliphatic and aromatic primary and secondary amines undergo acylation, a nucleophilic substitution reaction with acid chlorides, anhydrides, and esters. The products of acylation reactions are known as amides.