a
\(C{{H}_{3}}C{{H}_{2}}CH=C{{H}_{2}}\xrightarrow[(peroxide\,or\,anti-Markovnikov's\,effect)]{HBr/{{H}_{2}}{{O}_{2}}}\) \(\underset{(Y)}{\mathop{\underset{1-Bromobu\tan e}{\mathop{\begin{matrix}
\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,Br \\
\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,| \\
C{{H}_{3}}C{{H}_{2}}-CH-C{{H}_{2}} \\
\,\,\,\,| \\
\,\,\,\,\,H \\
\end{matrix}}}\,}}\,\xrightarrow[\Delta ]{{{C}_{2}}{{H}_{5}}ONa}\) \(\underset{(Z)}{\mathop{C{{H}_{3}}{{(C{{H}_{2}})}_{3}}-O-C{{H}_{2}}C{{H}_{3}}}}\,\)