Chapter 4, Problem 4.2YT

Interpretation Introduction

Interpretation:

A molecule of $\text{1, 1, 1-tribromoethane}$ (${\text{H}}_{\text{3}}{\text{C-CBr}}_{\text{3}}$) is to be constructed using a molecular modeling kit. The ${\text{CH}}_{\text{3}}$ and ${\text{CBr}}_{\text{3}}$ groups relative to each other are to be rotated until the molecule looks like the structure shown in the dash-wedge notation. The $\text{C-C}$ bonding axis is to be looked down, and the missing atoms in the incomplete Newman projection provided here are to be filled in.

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.