Hydrocarbons
Understanding the relative energy of rotational conformations
The following diagram shows the relative energy of 1,2-dibromoethane as one end of the molecule rotates around the C1 — C2 bond:
Relative Energy
Relative Rotation
The green eye shows how you should imagine looking down the C1 — C2 bond as you draw the Newman projection.
Draw the Newman projection for a conformation of 1,2-dibromoethane that has the relative energy described by point D on the energy diagram above. If there is more than one conformation that could have energy D, you only need to draw one of them.
Note: make sure to draw your Newman projection as viewed down the C1 — C2 bond (as indicated by the green eye).
Select a template to begin.
