Question

Which of the following is a tertiary allylic alcohol?

Options

• \[\ce{H2C = CH - CH2OH}\]

• \[\begin{array}{cc}
  \ce{H2C = CH - CH - OH}\\
  \phantom{.........}|\\
  \phantom{.............}\ce{CH3}
  \end{array}\]

• \[\begin{array}{cc}
  \ce{CH3}\\
  |\phantom{....}\\
  \phantom{....}\ce{H2C = C - CH - OH}\\
  \phantom{..........}|\\
  \phantom{..............}\ce{CH3}
  \end{array}\]

• \[\begin{array}{cc}
  \ce{CH3}\\
  |\phantom{....}\\
  \ce{CH2 = CH - C - OH}\phantom{..}\\
  \phantom{..........}|\\
  \phantom{..............}\ce{CH3}
  \end{array}\]

Answer 1

\[\begin{array}{cc}
\ce{CH3}\\
|\phantom{....}\\
\ce{CH2 = CH - C - OH}\phantom{..}\\
\phantom{..........}|\\
\phantom{..............}\ce{CH3}
\end{array}\]

Explanation:

In tertiary allylic alcohol, the −OH group is attached to a sp³ hybridised tertiary carbon atom, which is further bonded to a carbon-carbon double bond.