Question

Question #9327a

Answer 1

You start with a wedge-dash structure.

Explanation:

Then you convert the wedge-dash structure to a Newman projection.

The wedge-dash structure for the staggered conformation is shown below.

(from www.chem.ucalgary.ca)

You want to convert it to a Newman projection through the `"C2-C3"` bond.

So you must view the molecule along the `"C2-C3"` axis with your eye closest to the methyl group.

(from www.chem.ucalgary.ca)

The closest bonds make a "Y", so choose a template with the bonds making a "Y" on the front carbon.

Place the groups onto your template.

• The groups on `"C-2"` go on the front carbon; the groups on `"C-3"` in back.
• The groups with "normal" bonds go on the vertical lines: `"H"` in front and back.
• The groups with wedged bonds go on the left hand side: `"CH"_3` in front and `"H"` in back.
• The groups with dashed bonds go on the left hand side: `"H"` in front and back.

And you have a Newman projection for propane.

(from www.chem.ucalgary.ca)