Using Newman projections, draw the most stable conformer for each of the following:
a. 3-methylpentane, viewed along the C-2---C-3 bond

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

(a)

Convert the following Newman projections to skeletal structures and name them.

a.

b.

Draw all the staggered and eclipsed conformers that result from rotation about the C-2-C-3 bond of pentane.

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

b. 3-methylhexane, viewed along the C-3----C-4 bond

Draw a potential-energy diagram for rotation about the C-2---C-3 bond of pentane through 360°, starting with the least stable conformer.

For rotation about the C-3---C-4 bond of 2-methylhexane, do the following:

a. Draw the Newman projection of the most stable conformer.

b. Draw the Newman projection of the least stable conformer.

c. Draw Newman projections of the two conformers of the trans isomer.

d. Which of the conformers predominates at equilibrium?

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.]

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