Gauche effect in 2-fluoroethanol

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The discussion centers on the stability of conformations in 2-fluoroethanol and 1,2-difluoroethanol, highlighting that the gauche conformation is more stable than the anti conformation. It references March's Advanced Organic Chemistry, which states that intramolecular hydrogen bonding does not explain this stability. Instead, hyperconjugation is suggested as a reason, although it remains unclear to some participants. The stability in the gauche conformation is attributed to the arrangement of CH and CF bonds being in anti-position, allowing for resonance structures that involve interactions between the atoms not being perpendicular to the pi bonding plane. This nuanced understanding of the gauche effect is critical for grasping molecular stability in these compounds.
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Generally, anti confirmation is more stable. But in case of 2-fluoro ethanol and 1,2-difluoroethanol the gauche confirmation is more stable.

It's given in March's advanced organic chemistry book that intramolecular Hydrogen bonding is not the correct reason for the stability. Wikipedia explains it using hyperconjugation, but I am not able to understand it. What is the actual reason for gauche effect?
 
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In the gauche conformation, the CH and CF bonds are in anti-position. Hence you can draw a resonance structure H+ C=C F-. This is only possible if the two atoms are not perpendicular to the pi bonding plane.
 

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