Question

Which of the following reagents can bring about following conversion?

\[\ce{But-1-ene -> Butan-2-ol}\]

Options

• H₂O₂

• B₂H₆

• KOH aqueous

• (i) Cold cone. H₂SO₄, (ii) H₂O

Answer 1

(i) Cold cone. H₂SO₄, (ii) H₂O

Explanation:

\[\begin{array}{cc}
\ce{CH3 \underset{\text{But-1-ene}}{- CH2 - CH}= CH2 ->[cold conc. H2SO4][(M.R)] CH3 - CH2 - CH - CH3 ->[H2O][\Delta] CH3 - CH2 - CH - CH3 + H2SO4}\\
\phantom{....................................}|\phantom{.............................}|\\
\phantom{..........................................}\ce{OSO3H}\phantom{....................}\ce{\underset{\text{Butan-2-ol}}{OH}}\end{array}\]