Describe the mechanism of alcohol reacting both as nucleophiles and electrophiles in reactions.

Explanation

Alcohols as nucleophiles :

Alcohols as electrophiles :
Protonated alcohols act as electrophiles
`R-CH_(2)-OH+H^(+)rarr R-CH_(2)-overset(+)OH_(2)`
`Br^(-)+underset(R)underset(|)CH_(2)-overset(+)OH_(2)rarr Br - underset(R)underset(|)CH_(2)+overset(+)H_(2)O`