Question

Primary alcohols can be prepared from alkenes by:

• A. mercuration and demercuration of alkenes
• B. direct hydration of alkenes
• C. hydroboration of alkenes
• D. all of the above

Answer 1

The correct option is C hydroboration of alkenes

Primary alcohols can be prepared from alkene by hydroboration oxidation.
The hydroboration of propene followed by oxidation gives propanol.
The reagent used for hydroboration is diborane.
The reagent used for oxidation is alkaline hydrogen peroxide solution.
$6C{H}_{3}CH=C{H}_2+B_2{H}_6\to 2(C{H}_{3}C{H}_{2}C{H}_2{)}_{3}B$
$(C{H}_{3}C{H}_{2}C{H}_2{)}_{3}B+3H_2{O}_2\stackrel{O{H}^{-}}{\to }3C{H}_{3}C{H}_{2}C{H}_{2}OH+B(OH{)}_3$