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In which of the following conversions, phosphorus pentachloride is used as the reagent?
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Verified Answer
The correct answer is:
$\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{OH} \longrightarrow \mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{Cl}$
When ethyl alcohol is treated with $\mathrm{PCl}_{5}$, then ethyl chloride is formed.
$$
\begin{aligned}
\mathrm{CH}_{3} \mathrm{CH}_{2}-\mathrm{OH} &+\mathrm{PCl}_{5} \longrightarrow_{\Delta} \\
& \mathrm{CH}_{3} \mathrm{CH}_{2}-\mathrm{Cl}+\mathrm{HCl}+\mathrm{POCl}_{3}
\end{aligned}
$$
$$
\begin{aligned}
\mathrm{CH}_{3} \mathrm{CH}_{2}-\mathrm{OH} &+\mathrm{PCl}_{5} \longrightarrow_{\Delta} \\
& \mathrm{CH}_{3} \mathrm{CH}_{2}-\mathrm{Cl}+\mathrm{HCl}+\mathrm{POCl}_{3}
\end{aligned}
$$
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