Question

Sight along the C2-C1 bond of 2-methylpropane (isobutane).

(c) Make a graph of energy versus angle of rotation around the C2-C1 bond.

Short answer

(c)

Step-by-step solution

Graph of energy versus angle of rotation

The eclipsed conformation is less stable than the staggered conformation. This is because it comprises more potential energy due to the torsional strain.

Graph of energy versus angle of rotation around the C2-C1 bond

(c) A particular molecule’s stability is inversely related to its energy. Hence, the atom possessing less energy is more stable. The atom with high energy is least stable. The graph of energy versus the angle of rotation can be given as:

Graph of energy versus angle of rotation