Question

Diazonium Salts.

Answer 1

Aromatic diazonium salts are more stable than aliphatic diazonium salts due to resonance.

Because of their instability, diazonium salts cannot be stored and are used immediately after preparation.

Preparation 

This process of conversion of a primary aromatic amine into its diazonium salt is called diazotisation.

General formula is RN₂ ⁺X^- where R is alkyl or aryl group and X^- = Cl^- , Br^- , NO\(^-_3\) or any other anion.

Name : They are named by adding the word diazonium to the parent aromatic compound followed by the name of anion. For example, C₆H₅N₂Cl^- is benzene diazonium chloride, p–ClC₆H₄N₂HSO\(^-_4\) is p–chlorobenzene diazonium hydrogen sulphate.