Key Points
Key Points: Diazonium Salts
- Diazonium salts: Compounds with the general formula ArN₂⁺X⁻ (e.g., C₆H₅N₂⁺Cl⁻ = Benzenediazonium chloride).
- X⁻ = Cl⁻, Br⁻, HSO₄⁻, NO₃⁻, BF₄⁻, etc.
- Benzenediazonium chloride: Colourless crystalline solid; readily soluble in water; stable in cold but decomposes on warming; decomposes easily in dry state.
- Benzenediazonium fluoroborate: Water insoluble, stable at room temperature.
- The stability of arenediazonium ions is due to resonance — the positive charge is delocalised into the benzene ring.
