Chapter 4, Problem 4.3YT

Interpretation Introduction

Interpretation:

Substituents are to be added to the incomplete Newman projections to represent the first molecule after $\text{+60°}$ and $\text{+120°}$ rotations of the back carbon.

Concept introduction:

Newman projection is a $\text{2-D}$ depiction of a molecule observed down the bond of attention. In this projection, carbon atoms directly attached by the bond of attention shown explicitly. The front carbon shown as a point and back side carbon atom shown as a circle. The back-carbon atom connected to the circle and front carbon atom converge at the point. The bond of interest is not visible; instead, it must be imagined as connecting the front and back carbons. A Newman projection does, however, highlight the other bonds to the front and back atoms.