Question

# Write the equation involved in the following reactions: (i) Reimer-Tiemann reaction (ii) Kolbe's reaction

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## (i) Reimer-Tiemann reaction When phenol is treated with chloroform in the presence of sodium hydroxide, a group is introduced at the ortho position of the benzene ring. This reaction is known as the Reimer-Tiemann reaction. The intermediate is hydrolyzed in presence of alkalis to produce salicylaldehyde. (ii) Kolbe's reaction When phenol is treated with sodium hydroxide, sodium phenoxide is produced. This sodium phenoxide when treated with carbon dioxide, followed by acidification, undergoes electrophilic substitution to give ortho-hydroxybenzoic acid as the main product. This reaction is known as Kolbe's reaction.

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