AIIMS 2019 Chemistry Stability of Conformers MCQ Question
Which is most stable conformer of ethan-1,2-diol
Correct Answer
Detailed Explanation
In the case of intramolecular hydrogen bonding, the gauche conformer can be more stable than the anti-staggered form due to the favorable interaction between the hydrogen atom of one functional group and an electronegative atom (like O or N) of another group within the same molecule. This intramolecular hydrogen bond effectively lowers the overall energy of the molecule, enhancing stability despite the steric strain typically associated with the gauche conformation. Other options are not applicable as they do not provide relevant information or alternative conformational scenarios that would challenge the stability of the gauche form in the presence of intramolecular hydrogen bonding.
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