The correct statement regarding the comparison of staggered and eclipsed conformations of ethane, is:

(A)

The staggered conformation of ethane is more stable than eclipsed conformation, because staggered conformation has no torsional strain.

(B)

The staggered conformation of ethane is less stable than eclipsed conformation, because staggered conformation has torsional strain.

(C)

The eclipsed conformation of ethane is more stable than staggered conformation, because eclipsed conformation has no torsional strain.

(D)

The eclipsed conformation of ethane is more stable than staggered conformation even though the eclipsed conformation has torsional strain.

NEET - Medical UG-2016 Medium

Answer & Solution:

The staggered conformation of ethane is more stable than eclipsed conformation, because staggered conformation has no torsional strain.

Consider both the conformations of ethane.

First figure is staggered and the second one is Eclipsed conformation of ethane. In staggered condition the torsional strain is very low comparing to the eclipsed where it is very high.

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The correct statement regarding the comparison of staggered and eclipsed conformations of ethane, is:

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