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

Jun 14, 2015

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 ${\text{H}}_{A}$ and ${\text{H}}_{B}$ bonds is 60 °.

Start by drawing a template for a staggered Newman Projection.

Then add $\text{H}$ atoms to each of the bonds.

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).

Then add $\text{H}$ atoms to each of the bonds.

And you have your eclipsed Newman projection for ethane.