Department of Pre-University Education, KarnatakaPUC Karnataka Science Class 12
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Which halogen compound in each of the following pairs will react faster in SN2 reaction CH3Br or CH3I - Chemistry

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Which halogen compound in each of the following pairs will react faster in SN2 reaction CH3Br or CH3I

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Solution

CH3I will react faster in SN2 reaction than CH3Br. This is because I  is a better leaving group, owing to its greater size than Br. As a result, it will leave at a faster rate in the presence of an incoming nucleophile.

Concept: P - Block Group 17 Elements - Concept of Group 17 Elements
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