Thestructures of two different alkyl bromides both of which yield the indicated alkene as the exclusive product of E2 elimination are to be determined. Concept introduction: > The alkyl halides in presence of a strong base undergo dehydrohalogenation and form the corresponding alkene. > In dehydrohalogenation H and X (halogen atom) areeliminated from adjacent carbons. > The elimination of primary alkyl halides proceeds through E2 mechanism. > In E2 mechanism, the attack of base and detachment of leaving group occurs simultaneously, and there is no carbocation formation step. > According to Zaitsev rule, themost substituted alkene is the major product.

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Chapter 7, Problem 44P

Interpretation Introduction

Interpretation:

Thestructures of two different alkyl bromides both of which yield the indicated alkene as the exclusive product of E2 elimination are to be determined.

Concept introduction:
>
The alkyl halides in presence of a strong base undergo dehydrohalogenation and form the corresponding alkene.
>
In dehydrohalogenation H and X (halogen atom) areeliminated from adjacent carbons.
>
The elimination of primary alkyl halides proceeds through E2 mechanism.
>
In E2 mechanism, the attack of base and detachment of leaving group occurs simultaneously, and there is no carbocation formation step.
>
According to Zaitsev rule, themost substituted alkene is the major product.

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