7.  Organohalides

7.4 Mechanisms of Elimination Reactions

In this section, you need to know the following information:

1)  The E1 Reaction and the E2 Reaction mechanism

2) Differing in the time of C—H and C—X bond breaking

3) E1 reaction: C-X bond breaks first to give acarbocation

 intermediate, followed by base removal of aproton to yield the alkene

4) E2 reaction: C-H and C-X bonds break simultaneously, giving the alkene in a single step without intermediate

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