Question
Write a note on the reaction of alcohols with phosphrous trihalides.

Answer

$\rightarrow$ Alcohols react with phosphrous trihalides to give corresponded alkyl halides.
This reaction is useful for preparation of alkyl halides from alcohols. $\ce{3R-OH + PX 3 \rightarrow 3R-X + H3PO3 (X = Cl, Br)}$

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