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Select the correct stability order of the conformation /Rotamers/ Rotational isomers of Ethane Molecule

(a) Partially Eclipsed > Fully Eclipsed > Anti-staggered > Skew or Gouche

(b) Skew or Gouche > Partially Eclipsed > Fully Eclipsed > Anti-staggered

(c) Anti-staggered > Skew or Gouche > Partially Eclipsed > Fully Eclipsed

(d) Fully Eclipsed > Anti-staggered > Skew or Gouche > Partially Eclipsed
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The correct answer is c) Anti-staggered > Skew or Gouche > Partially Eclipsed > Fully Eclipsed

 

EXplaination ::

The isomers which can be produced by the free rotation about single bond are known as conformation /Rotamers/ Rotational isomers and this phenomenon is called as conformational analysis 

In conformational analysis (energetics study of different rotational conformers or rotamers), structures are represented by *Newman projection * (atoms and bonds are viewed along the axis of rotation).

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