Q. 10 A4.6( 5 Votes )

Write the chemical equations involved in the following reactions :

(i) Kolbe’s reaction

(ii) Friedal – Crafts acetylation of anisole

Answer :

(i) Kolbe’s reaction: Sodium phenoxide when heated with carbon dioxide at 400K under a pressure of 4-7 atm followed by acidification gives salicylic acid. This reaction is called Kolbe’s reaction.

(ii) Friedal – Crafts acetylation of anisole

Note: Friedel-Crafts acylation: When any benzene or its derivative is treated with acetyl chloride (R-COCl) in the presence of anhydrous aluminum chloride (AlCl3) to form acetyl substituted benzene or its derivatives, this reaction is called Friedel-Crafts acylation. For example:

Benzene Acetyl chloride Acetyl benzene

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