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8.2 Organic chemistry isomerism — Chemistry STD 11 Science — Question

Rajasthan BoardEnglish MediumSTD 11 ScienceChemistry8.2 Organic chemistry isomerism1 Mark
MCQ
How many enol form is possible for $\begin{array}{*{20}{c}}
  {O\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,} \\ 
  {||\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,} \\ 
  {C{H_3} - C{H_2} - C - C{H_2} - C{H_2} - C{H_3}} 
\end{array}$ (including stereoisomers) will be ?
  • A
    $2$
  • B
    $3$
  • ✓
    $4$
  • D
    $5$
✓

Answer

Correct option: C.
$4$
c
$\begin{matrix}
   \,\,\,\,\,\,OH\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,  \\
   \,|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,  \\
   C{{H}_{3}}-CH=C-C{{H}_{2}}-C{{H}_{2}}-C{{H}_{3}}  \\
\end{matrix}$ $(E\,and\,Z)$  $\begin{matrix}
   \,\,\,\,\,\,OH\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,  \\
   \,|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,  \\
   C{{H}_{3}}-CH-C=C{{H}_{2}}-C{{H}_{2}}-C{{H}_{3}}  \\
\end{matrix}$  (cis and trans)

Total $= 4$ enol fonns

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