Benzene and Alkyl Benzene - Result Question 55
55. Write down the reaction involved in the preparation of the following using the reagents indicated against in parenthesis.
“Ethyl benzene from benzene.”
$ \left[\mathrm{C}_2 \mathrm{H}_5 \mathrm{OH}, \mathrm{PCl}_5 \text {, anhyd. } \mathrm{AlCl}_3\right] $
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Solution:
$ \begin{alignedat} & \mathrm{CH}_3 \mathrm{CH}_2 \mathrm{OH}+\mathrm{PCl}_5 \longrightarrow \mathrm{POCl}_3+\mathrm{HCl}+\mathrm{CH}_3 \mathrm{CH}_2 \mathrm{Cl} \\ & \mathrm{C}_6 \mathrm{H}_6+\mathrm{CH}_3 \mathrm{CH}_2 \mathrm{Cl} \xrightarrow{\mathrm{AlCl}_3} \mathrm{C}_6 \mathrm{H}_5-\mathrm{CH}_2 \mathrm{CH}_3 \end{aligned} $
Friedel-Crafts reaction
BETA
