4. Alkanes and Cycloalkanes

Which of the following conformers of isobutyl chloride is the most stable?

Construct a graph, similar to Figure 3-11, of the torsional energy of 3-methylpentane along the C2―C3 bond.

c. Begin your graph at the 0° dihedral angle and begin to turn the front carbon.

Draw a graph, similar to Figure 3-11, of the torsional energy of 2-methylbutane as it rotates about the C2—C3 bond.

Draw a graph, similar to Figure 3-9, of the torsional strain of 2-methylpropane as it rotates about the bond between C1 and C2. Show the dihedral angle and draw a Newman projection for each staggered and eclipsed conformation.

Given the following Newman projection of ethane viewed down the $C_1-C_2$ bond, which bond-line structure does it represent? (Front carbon: three hydrogens; back carbon: three hydrogens; all staggered)

Which of the following diagrams correctly represents a Newman projection for propane when viewed along the $C_1–C_2$ bond?

Which of the following diagrams represents a Newman projection of butane?