Question
Write a note on the reaction of alcohols with phosphrous trihalides.
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Answer
$\rightarrow $ Alcohols react with phosphrous trihalides to give corresponded alkyl halides. This reaction is useful for preparation of alkyl halides from alcohols.
$3R-OH + PX_3 \rightarrow 3R-X + H_3PO_3 (X = Cl, Br)$
$3R-OH + PX_3 \rightarrow 3R-X + H_3PO_3 (X = Cl, Br)$
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