For each of the following structures, which staggered Newman projection skeleton from Assessment 3.51 should you draw first to show what is seen when looking down the indicated bond?
(d) <IMAGE>

Draw Newman projections of the following molecules viewed from the direction of the blue arrows.

(c)

For each molecule, draw the Newman projection you would observe if you looked down the C_a - C_b bond in the direction indicated.

(d) <IMAGE>

Given the following structures, show the Newman projection that would result from looking down the indicated bond in the direction shown. [Orient yourself as if you were the eyeball looking down the bond. Some of the examples have been partially completed for you to fill in the rest.]

(b) <IMAGE>

Looking down the indicated bond, show the three most stable conformations and choose the one that is most stable. Be sure that the first Newman projection you show is the one you see initially (before rotation). [Why should none of your three Newman projections show eclipsed conformations?]

(b) <IMAGE>

Convert each Newman projection to the equivalent line–angle formula, and assign the IUPAC name.

(c)

(d)

Using Newman projections, draw the most stable conformer for each of the following:

c. 3,3-dimethylhexane, viewed along the C-3---C-4 bond

For the following molecule, draw the Newman projection (around the 2,3-bond) with a dihedral angle of 180° between the bromine and hydrogen.