question_answer

Increasing order of stability among the three main conformations (i.e.. Eclipse, Ami, Gauche) of 2-fluoroethanol is     AIEEE  Solved  Paper-2006

A) Eclipse, Gauche, Anti

B) Gauche, Eclipse, Anti

C) Eclipse, Anti, Gauche

D) Anti, Gauche, Eclipse

Correct Answer: C

Solution :

\[HO-C{{H}_{2}}-C{{H}_{2}}-F\] \[2\text{ }-\text{ }fluoroethanol\] 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.