Department of Pre-University Education, KarnatakaPUC Karnataka Science Class 12
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Write the Mechanism of Acid-catalysed Dehydration of Ethanol to Yield Ethene. - Chemistry

Write the mechanism of acid-catalysed dehydration of ethanol to yield ethene.

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Solution

The mechanism of acid dehydration of ethanol to yield ethene involves the following three steps:

Step 1:

Protonation of ethanol to form ethyl oxonium ion:

Step 2:

Formation of carbocation (rate determining step):

Step 3:

Elimination of a proton to form ethene:

The acid consumed in step 1 is released in Step 3. After the formation of ethene, it is removed to shift the equilibrium in a forward direction.

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APPEARS IN

NCERT Class 12 Chemistry Textbook
Chapter 11 Alcohols, Phenols and Ethers
Q 19 | Page 345
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