1. Draw the least stable conformation of pentane using a Newman projection of the view
along the C2-C3 bond.
2. Using the table of strain energies below, arrange the conformations of 2-methylbutane in
order of increasing stability (1=least stable, 3=most stable). What is the difference in energy
between the most stable and the least stable confotmation?
Strain energies:
H-H eclipsing = 1 kcal/mol
CH3-H eclipsing = 1.3 kcal/mol
CH3-CH3 eclipsing = 3.0 kcal/mol
CH3-CH3 gauche = 0.9 kcal/mol
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