Question

The major product [B] in the following reactions is:

\[\begin{array}{cc}\ce{CH3}\phantom{..................................}\\|\phantom{.....................................}\\\ce{CH3 - CH2 - CH - CH2 - OCH2 - CH3 ->[HI][Heat] [A] alcohol ->[H2SO4][\Delta] [B]}\end{array}\]

Options

• \[\ce{CH2 = CH2}\]

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

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

• \[\ce{CH3 - CH2 - CH = CH - CH3}\]

Answer 1

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

Explanation:

\[\begin{array}{cc}
\phantom{.........}\ce{CH3}\phantom{.............................................}\ce{CH3}\phantom{.................................................}\ce{CH3}\\
\phantom{.......}|\phantom{.................................................}|\phantom{.....................................................}|\\
\ce{H3C - CH2 - CH - CH2 - O - CH2 - CH3 ->[HI][Heat] CH3 - CH2 - \underset{[A]}{CH} - CH2 - OH + CH3CH2 - I ->[H2SO4/\Delta] CH3 - C\underset{[B]}{H =} C - CH3}
\end{array}\]