Elimination Reactions for Aliphatic Systems— Formation of Alkenes

13 Elimination Reactions for Aliphatic Systems-Formation of Alkenes 

Eliminations to create alkenes can occur from neutral structures, or they can involve car-benium ions, carbanions, or radical intermediates. We look at all these possibilities below within the context of aliphatic systems. Although eliminations can occur on alkenes to make alkynes and on arenes (see the benzyne reaction. Section 10.20), we concentrate our discussion on aliphatics, because this is the most common type of system to undergo elimination. Before looking at the details, let s review the E2 and El mechanisms and electron pushing, and define the terms 1,2-elimination , 1,4-elimination , and p-elimination . 

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ELIMINATION REACTIONS FOR ALIPHATIC SYSTEMS —FORMATION OF ALKENES... 

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