Chapter 7, Problem 41P

Interpretation Introduction

Interpretation:

The number of alkenesthat will form under $\text{E2}$ elimination for each of the given alkyl bromides are to be determined.

Concept Introduction:

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$\text{E2}$ elimination is a single step mechanism involving both the substrate and the base in the rate determining step.

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The base extracts a $\text{β-proton}$ from a carbon next to the carbon bonded to halogen. Simultaneously, the bond pair moves to form the pi-bond between these two carbon atoms, and the halogen leaves as halide ion, with its bond pair.

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The number of products formed depends on the number of distinct $\text{β-carbon}$ atoms bearing hydrogen atoms.