Answer
Connected to the point on the center:
Down: Ethyl (Et)
Right: Hydrogen (H)
Left: Hydrogen (H)
Connected to the circle:
Up: Ethyl (Et)
Right: Hydrogen (H)
Left: Methyl (Me)
Work Step by Step
1. Look to the atoms/groups that are connected to the front carbon (the carbon in the left):
- Down: A group of 2 carbons : Ethyl (Et).
- Right: The group with the wedge: Hydrogen (H).
- Left: The group with the dash: Hydrogen (H).
Since the front carbons are represented by a point on the center of the circle, these are the groups that you are going to draw, in the same position, connected to the center in the Newman projection.
2. Look to the atoms/groups that are connected to the back carbon (the carbon in the right):
- Up: A group of 1 carbon : Ethyl (Et).
- Right: The group with the wedge : Hydrogen (H).
- Left: The group with the dash: Methyl (Me).
Since the back carbon is represented by the circle, these are the groups that you are going to draw, in the same position, connected to the circle in the Newman projection.
