Chapter 2, Problem 2.40AP

Interpretation Introduction

Interpretation:

The compound having the larger energy barrier to internal rotation about the indicated bond is to be stated with explanation.

Concept introduction:

Newman projection is a way of representing the groups attached to carbon atoms in the $\text{C}-\text{C}$ bonds. This is used to determine the interaction between the groups attached to carbon atoms and the dihedral angle. The front carbon atom in the Newman projection is represented by the dot and the end on carbon atom is represented by the circle. The groups attached to the carbon atoms are then drawn by the line.

The energy of the conformers varies with change in their dihedral angle. The plot of this variation is known as potential energy curve.