Kolbe’s reaction / Carboxylation reaction
When phenol reacts with NaOH gives Sodium phenoxide.
Then, Sodium phenoxide reacts with carbondioxide to give
sodium salicylic acid and which upon reaction with HCL gives Salicylic acid.
Salicylic acid on reaction with acetyl chloride or ethanoyl
chloride gives aspirin.
This overall reaction is known as Kolbe's reaction. It is also known as Carboxylation reaction.
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