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Polyhalogen Compounds

Write one-one...

Question

Write one-one use of following reagent.
(i) $P C l_{5}$ (ii) $(C H_{3} C O)_{2} O$

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Solution

(i) $P C l_{5}$ (Phosphorous penta chloride) is used to convert alcohol to alkyl halide.
$C H_{3} - C H_{2} - O H Ethyl alcohol + P C l_{5} Δ - \to C H_{3} - C H_{2} - C l Ethyl chloride + H C l + P O C l_{3}$
(ii) $(C H_{3} - C | | O -)_{2} O$ (Acetic anhydride) is used to convert alcohols to esters.
$C H_{3} - C H_{2} - O H + (C H_{3} - C | | O -)_{2} O H^{+} - - \to C H_{3} - C | | O - O - C H_{2} - C H_{3} + C H_{3} - C | | O - O H$

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