Q. Increasing order of stability among the three main conformations (i.e., $Eclipse,\ Anti,\ Gauche$) of 2-fluoroethanol is
A) $Eclipse,\ Gauche,\ Anti$
B) $Gauche,\ Eclipse,\ Anti$
C) $Eclipse,\ Anti,\ Gauche$
D) $\ Anti,\ Gauche,\ Eclipse$
Explanation
(c)
$HO - CH_{2} - CH_{2} - F$
[image:12_image494.emf]
$Gauche$ conformation is comparatively more stable due to hydrogen linkage in between F and H (at O-atom), hence order is $Eclipse,\ Anti$ (staggered), $Gauche$.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.