How can I compare the staggered conformer and eclipsed conformers for (ethane) #H_3C- CH_3# in Newman projections?

1 Answer
Jun 14, 2015

Answer:

In the staggered conformation, the dihedral angle is 60 °. In the eclipsed conformation, the dihedral angle is 0 °.

Explanation:

Staggered Ethane

The dihedral angle is the angle between the front and rear bonds.

In the staggered version of ethane, the angle between the #"H"_A# and #"H"_B# bonds is 60 °.

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Start by drawing a template for a staggered Newman Projection.

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Then add #"H"# atoms to each of the bonds.

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And you have your staggered Newman projection for ethane.

Eclipsed Ethane

In the eclipsed conformation, the angle behind the front and rear bonds is 0 °( I have off-set the rear bonds slightly so you can see them).

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Then add #"H"# atoms to each of the bonds.

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And you have your eclipsed Newman projection for ethane.