Gomberg–Bachmann Reaction and Mechanism

Gomberg–Bachmann Reaction

The arene compound reacts with a diazonium salt in the presence of a base to form biaryl compound through an intermediate aryl radical. It was discovered by Moses Gomberg and Werner Emmanuel Bachmann

Gomberg–Bachmann Reaction Mechanism

Gomberg–Bachmann Reaction mechanism involves radical intermediates and completed in the following steps-

1. The diazonium salt reacts with a base to form a diazonium oxide intermediate.
2. Loss of nitrogen gas and generates an aryl radical.
3. The aryl radical attacks the arene, forming a biaryl radical intermediate.
4. Finally, this intermediate loses a hydrogen atom to form the final biaryl product.