Chapter 8, Problem 8.14YT

Interpretation Introduction

Interpretation:

A model kit is to be constructed for the given alkyl halide substrate which undergoes $\text{E2}$ reaction, and the position of the phenyl ring is to be compared with its product.

Concept introduction:

$\text{E2}$ reaction is the stereospecific reaction and gives only one diastereoisomers as the product. For an $\text{E2}$ reaction to occur, the leaving group and a hydrogen atom on the adjacent carbon that is eliminated must be anti to each other. Since there are no restriction around a $\text{C-C}$ single bond, they can rotate to get the required anti conformation. The anti-conformation is better understood with its Newman projection.