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Reactivity Of Haloalkanes

Easychemistry

Arrange the following alkyl halides in decreasing order of reactivity towards SN2 reaction: CH3I, CH3Br, CH3Cl, CH3F

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About This Question

Subject
chemistry
Chapter
organic compounds containing halogens
Topic
reactivity of haloalkanes
Difficulty
Easy
Year
2025
Tags
SN2Leaving GroupBond Strength

Solution

Correct Answer:

For the same alkyl group, SN2 reactivity increases with better leaving group ability. The C-I bond is weakest and I- is the best leaving group among halides, followed by Br-, Cl-, and F-. Therefore the order is CH3I > CH3Br > CH3Cl > CH3F.

This easy difficulty chemistry question is from the chapter organic compounds containing halogens, covering the topic of reactivity of haloalkanes. It appeared in the 2025 exam.

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