MCQ
$\begin{matrix}
   \,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,O  \\
   \,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,||  \\
   HO-\underset{(3)}{\mathop{C{{H}_{2}}}}\,-\underset{(2)}{\mathop{C{{H}_{2}}}}\,-\underset{(1)}{\mathop{C}}\,-H  \\
\end{matrix}$

Which conformer of above compound is most stable (consider conformer across $(C_2 -C_3)$

  • A
    Staggered
  • Gauche
  • C
    Fully eclipsed
  • D
    Partially eclipsed

Answer

Correct option: B.
Gauche
b
Gauche is most stable due to intramolecular $H$ -bonding

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