Which among CH3X, R-CH2-X, R2CHX, R3CX is most reactive towards SN2 reaction:
Correct answer: D. CH3X
- A. R3CX
- B. RCH2X
- C. R2CHX
- D. CH3X
Explanation
Smaller the R group greater the reactivity. Reactivity order towards SN2 CH3X >RCH2X>R2CHX increase in R-groups increase steric hindrance.The correct option for the most reactive alkyl halide towards SN2 reaction is D) CH3X. Methyl halides have the least steric hindrance and are the most reactive among the given options.
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About Alkyl Halides
Alkyl halides are named and related to their carbon-halogen structure, polarity and reactivity. The key reactions are nucleophilic substitution by SN1 and SN2 mechanisms and elimination by E1 and E2 mechanisms, including how substrate structure, nucleophile, base, solvent and temperature influence substitution versus elimination.
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