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  • . Write the equations involved in the following reactions : (a) Kolbe’s reaction (b) Friedel-Crafts alkylation of anisole

. Write the equations involved in the following reactions : (a) Kolbe’s reaction (b) Friedel-Crafts alkylation of anisole

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(a) Kolbe's Reaction

Phenol reacts with sodium hydroxide and carbon dioxide to form salicylic acid after acidification.

$
\mathrm{C}_6 \mathrm{H}_5 \mathrm{ONa}+\mathrm{CO}_2 \xrightarrow[4-7 \mathrm{~atm}]{373 \mathrm{~K}} \mathrm{o}-\mathrm{HOC}_6 \mathrm{H}_4 \mathrm{COONa} \xrightarrow{\mathrm{H}} \mathrm{o}-\mathrm{HOC}_6 \mathrm{H}_4 \mathrm{COOH}
$

(b) Friedel-Crafts Alkylation of Anisole

Anisole reacts with methyl chloride in the presence of anhydrous $\mathrm{AlCl}_3$ to give ortho and para methylanisole.

$
\mathrm{C}_6 \mathrm{H}_5 \mathrm{OCH}_3+\mathrm{CH}_3 \mathrm{Cl} \xrightarrow{\text { anhyd. } \mathrm{AlCl}_3} \mathrm{o}-\mathrm{CH}_3 \mathrm{C}_6 \mathrm{H}_4 \mathrm{OCH}_3+\mathrm{p}-\mathrm{CH}_3 \mathrm{C}_6 \mathrm{H}_4 \mathrm{OCH}_3
$

Posted by

Kushal Chakraborty

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