PUC Karnataka Science Class 12Department of Pre-University Education, Karnataka
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Predict All the Alkenes that Would Be Formed by Dehydrohalogenation of the Following Halides with Sodium Ethoxide in Ethanol and Identify the Major Alkene 2-chloro-2-methylbutane - PUC Karnataka Science Class 12 - Chemistry

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Question

Predict all the alkenes that would be formed by dehydrohalogenation of the following halides with sodium ethoxide in ethanol and identify the major alkene

2-Chloro-2-methylbutane

Solution

In the given compound, there are two different sets of equivalent β-hydrogen atoms labelled as a and b. Thus, dehydrohalogenation of the compound yields two alkenes.

Saytzeff’s rule implies that in dehydrohalogenation reactions, the alkene having a greater number of alkyl groups attached to a doubly bonded carbon atoms is preferably produced.

Therefore, alkene (I) i.e., 2-methylbut-2-ene is the major product in this reaction.

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APPEARS IN

 NCERT Solution for Chemistry Textbook for Class 12 (2015 to Current)
Chapter 10: Haloalkanes and Haloarenes
Q: 10.2 | Page no. 311
Solution Predict All the Alkenes that Would Be Formed by Dehydrohalogenation of the Following Halides with Sodium Ethoxide in Ethanol and Identify the Major Alkene 2-chloro-2-methylbutane Concept: Chemical Reactions of Haloalkanes and Haloarenes - Reactions of Haloalkanes - Nucleophilic Substitution Reactions.
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