What is the increasing order of stability of the three main conformations (i.e., E c l i p s e ,   A n…

1. $Eclipse, Gauche, Anti$
2. $Gauche, Eclipse, Anti$
3. $Eclipse, Anti, Gauche$
4. $Anti, Gauche, Eclipse$

Solution

$\mathrm{H}\mathrm{O}-\mathrm{C}{\mathrm{H}}_2-\mathrm{C}{\mathrm{H}}_2-\mathrm{F}$

$Gauche$ conformation is comparatively more stable due to hydrogen linkage in between F and H (at O-atom), hence order is $Eclipse, Anti$ (staggered), $Gauche$. ^

Asked in: JEE-TOPICTESTS-CHEMISTRY

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