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નીચેની પ્રકિયા માં 

$(i) \,\,\begin{array}{*{20}{c}}
  {C{H_3}\,\,\,\,\,\,\,\,\,\,\,} \\ 
  {|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,} \\ 
  {C{H_3} - C - CH - C{H_3}} \\ 
  {\,\,\,\,\,|} \\ 
  {\,\,\,\,\,\,\,\,\,\,\,\,OH} 
\end{array}\,\xrightarrow{{{H^ + }/heat}}\,\,\mathop A\limits_{[Major\,product]} \, + \,\mathop B\limits_{[Minor\,product]} $

$(ii)\,\, A\xrightarrow[{in\,\,absence\,\,\,of\,peroxide}]{{HBr,\,dark}}\,\,\mathop C\limits_{[Major\,product]} \, + \,\mathop D\limits_{[Minor\,product]} $

મુખ્ય નીપજ $(A)$ અને  $(C)$ અનુક્રમે શું હશે ?

  • A$\begin{array}{*{20}{c}}
      {C{H_3}\,\,\,\,\,\,\,\,\,\,\,} \\ 
      {|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,} \\ 
      {C{H_2} = C - C{H_2} - C{H_3}} 
    \end{array}$ and $\begin{array}{*{20}{c}}
      {C{H_3}\,\,\,\,\,\,\,\,\,\,\,} \\ 
      {|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,} \\ 
      {C{H_3} - C - C{H_2} - C{H_3}} \\ 
      {|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,} \\ 
      {Br\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,} 
    \end{array}$
  • B$\begin{array}{*{20}{c}}
      {C{H_3}\,\,\,\,\,\,\,\,\,\,\,\,} \\ 
      {|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,} \\ 
      {C{H_3} - C = CH - C{H_3}} 
    \end{array}$ and $\begin{array}{*{20}{c}}
      {C{H_3}\,\,\,\,\,\,\,\,\,\,\,} \\ 
      {|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,} \\ 
      {C{H_3} - C - C{H_2} - C{H_3}} \\ 
      {|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,} \\ 
      {Br\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,} 
    \end{array}$
  • C$\begin{array}{*{20}{c}}
      {C{H_3}\,\,\,\,\,\,\,\,\,\,\,} \\ 
      {|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,} \\ 
      {C{H_2} = C - C{H_2} - C{H_3}} 
    \end{array}$ and $\begin{array}{*{20}{c}}
      {C{H_3}\,\,\,\,\,\,\,\,\,\,\,} \\ 
      {|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,} \\ 
      {C{H_3} - C - C{H_2} - C{H_3}} \\ 
      {|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,} \\ 
      {Br\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,} 
    \end{array}$
  • D$\begin{array}{*{20}{c}}
      {C{H_3}\,\,\,\,\,\,\,\,\,\,\,} \\ 
      {|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,} \\ 
      {C{H_3} - C = CH - C{H_3}} 
    \end{array}$ and $\begin{array}{*{20}{c}}
      {C{H_3}\,\,\,\,\,\,\,\,\,\,\,\,\,\,} \\ 
      {|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,} \\ 
      {C{H_3} - CH - CH - C{H_3}} \\ 
      {\,\,\,\,\,\,\,\,\,\,\,|} \\ 
      {\,\,\,\,\,\,\,\,\,\,\,\,Br} 
    \end{array}$
AIPMT 2011, Diffcult
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b
\(\begin{matrix}
   \begin{matrix}
   C{{H}_{3}}\,\,\,\,\,\,\,\,\,\,\,\,\,  \\
   |\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,  \\
\end{matrix}  \\
   C{{H}_{3}}CH-CHC{{H}_{3}}  \\
   \,\,\,\,\,\,\,\,\,\,\,\,\,|\,\,  \\
   \,\,\,\,\,\,\,\,\,\,\,\, \,\,\,OH  \\
\end{matrix}\) \(\xrightarrow[{heat}]{{{H^ + }}}\) \(\begin{array}{*{20}{c}}
  {C{H_3}\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,} \\ 
  {|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,} \\ 
  {C{H_3} - CH - \mathop C\limits_ \oplus  H - C{H_3}} 
\end{array}\) \(\xrightarrow{{1\,,\,2\, - \,hydride\,shift}}\) \(\begin{array}{*{20}{c}}
  {C{H_3}\,\,\,\,\,\,\,\,\,\,\,\,\,} \\ 
  {|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,} \\ 
  {C{H_3} - \mathop C\limits_ \oplus   - C{H_2} - C{H_3}} 
\end{array}\) \(\xrightarrow{{ - \,{H^ + }}}\) \(\underset{\begin{smallmatrix} 
 (A) \\ 
 Major 
\end{smallmatrix}}{\mathop{\begin{matrix}
   C{{H}_{3}}\,\,\,\,\,\,\,\,\,\,  \\
   |\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,  \\
   C{{H}_{3}}-C=CH-C{{H}_{3}}  \\
\end{matrix}}}\,\)  \(+\)  \(\underset{\begin{smallmatrix} 
 (B) \\ 
 Minor 
\end{smallmatrix}}{\mathop{\begin{matrix}
   C{{H}_{3}}\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,  \\
   |\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,  \\
   C{{H}_{3}}-CH-CH=C{{H}_{2}}  \\
\end{matrix}}}\,\)

\(\underset{\begin{smallmatrix} 
 (A) \\ 
 Major 
\end{smallmatrix}}{\mathop{\begin{matrix}
   C{{H}_{3}}\,\,\,\,\,\,\,\,\,\,  \\
   |\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,  \\
   C{{H}_{3}}-C=CH-C{{H}_{3}}  \\
\end{matrix}}}\,\)  \(\xrightarrow[{in\,\,absence\,\,of\,\,peroxide}]{{HBr\,,\,dark}}\)  \(\mathop {\begin{array}{*{20}{c}}
  {\begin{array}{*{20}{c}}
  {C{H_3}\,\,\,\,\,\,} \\ 
  {|\,\,\,\,\,\,\,\,\,\,} 
\end{array}\,\,\,\,\,\,\,\,} \\ 
  {C{H_3} - C - C{H_2} - C{H_3}} \\ 
  {\,|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,} \\ 
  {\,Br\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,} 
\end{array}}\limits_{(C)\,\,\,major} \) \(\mathop {\begin{array}{*{20}{c}}
  {\begin{array}{*{20}{c}}
  {C{H_3}\,\,\,\,} \\ 
  {|\,\,\,\,\,\,\,\,\,\,\,\,} 
\end{array}\,\,\,\,\,\,\,\,\,\,} \\ 
  {C{H_3} - CH - CH - C{H_3}} \\ 
  {\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,} \\ 
  {\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,Br\,\,\,\,\,\,\,\,\,\,\,\,\,} 
\end{array}}\limits_{(D)\,\,\,minor} \)

art

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