Department of Pre-University Education, KarnatakaPUC Karnataka Science Class 12
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Write the Mechanism of the Following Reaction - Chemistry

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Write the mechanism of the following reaction :

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Solution 1

Primary alcohols such as ethanol react by SN2 mechanism with halogen acid such as HBr as follows:

Solution 2

This is a nucleophilic substitution reaction. It follows SN2 mechanism. The mechanism is as follows:

1) Protonation of hydroxyl group to make it a good leaving group.

2) Displacement of water molecule by bromide ion to form alkyl bromide.

Concept: Chemical Reactions of Alcohols and Phenols - Reactions Involving Cleavage of Carbon–Oxygen (C–O) Bond in Alcohols
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