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प्रश्न
Write a note on Kolbe's reaction
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उत्तर
Kolbe’s reaction: When phenol reacts with sodium hydroxide, sodium phenoxide is obtained. Phenoxide ion being more reactive than phenol towards electrophilic substitution. Phenoxide undergoes electrophilic substitution with carbon dioxide at 398 K under pressure of 6 atm (a weak electrophile) followed by acid hydrolysis, salicylic acid is formed as major product.
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