Alcohols An E1 Reaction

Acid-Catalyzed Dehydration of Secondary or Tertiary Alcohols An E1 Reaction [Pg.301]

2° or 3° Alcohol Acid catalyst Protonated alcohol Conjugate [Pg.301]

The alcohol accepts a proton from the acid in a fast step. [Pg.301]

The protonated alcohol loses a molecule of water to become a carbocation. This step is slow and rate determining. [Pg.301]

The carbocation loses a proton to a base. In this step, the base may be another molecule of the alcohol, water, or the conjugate base of the acid. The proton transfer results in the formation of the alkene. Note that the overall role of the acid is catalytic (it is used in the reaction and regenerated). [Pg.301]

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