Question

Write the structure of the major organic product in the following reaction:

\[\ce{CH3CH = C(CH3)2 + HBr ->}\]

Answer 1

\[\begin{array}{cc}
\phantom{..}\ce{CH3}\phantom{......................................}\ce{CH3}\\
\phantom{.}|\phantom{..........................................}|\phantom{..}\\
\ce{CH3 - CH = C - CH3 + HBr ->[Markovnikov’s][addition] CH3 - CH2 - C - CH3}\phantom{........}\\
\phantom{..........................................}|\\
\phantom{...........................................}\ce{\underset{2-Bromo-2-methylbutane}{Br}}
\end{array}\]

Answer 2

\[\ce{\underset{2-mrthyl-2-butene}{CH3CH = C(CH3)2} + HBr ->\underset{2-Bromo-2-methylbutane}{CH3CH2C(Br)(CH3)2}}\]