Problem 3.16 Consider 2-methylpropane (isobutane). Sighting along the C2-C1 bond:
(a) Draw a Newman projection of the most stable conformation.
(b) Draw a Newman projection of the least stable conformation.
(c) Make a graph of energy versus angle of rotation around the C2-C1 bond.
(d) Since an H---H eclipsing interaction costs 4.0 kJ/mol and H---CH3 eclipsing interaction costs 6.0 kJ/mol, assign relative values to the maxima and minima in your graph.
Problem 3.17 Sight along the C2-C3 bond of 2,3-dimethylbutane,and a Newman projection of the
most stable conformation.
Problem 3.18 Draw a Newman projection along the C2-C3 bond of the following conformation 2,3-dimethylbutane, and calculate a total strain energy :
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