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NEET 2008
Exam
NEET
Year
2008
Subject
Chemistry
Chapter
Chapter

NEET 2008 · Chemistry · Chapter

S_N 2 reaction readily occurs in

SN2S_N 2 reaction readily occurs in \text{ reaction readily occurs in }S_N 2 reaction readily occurs in

Options

  1. ACH3CH2−O−CH3\mathrm{CH}_3 \mathrm{CH}_2-\mathrm{O}-\mathrm{CH}_3
  2. BWhat do populations evolve to maximize in their habitat?
  3. CCH2=CH−CH2−O−CH3\mathrm{CH}_2=\mathrm{CH}-\mathrm{CH}_2-\mathrm{O}-\mathrm{CH}_3
  4. DPh−CH2−O−CH2−CH3\mathrm{Ph}-\mathrm{CH}_2-\mathrm{O}-\mathrm{CH}_2-\mathrm{CH}_3

Correct answer

A. CH3CH2−O−CH3\mathrm{CH}_3 \mathrm{CH}_2-\mathrm{O}-\mathrm{CH}_3

Step-by-step solution

SN2S_N 2 reactions occur more readily at carbons that are less substituted. It is easier for the nucleophile to attack if there is little substitution around the C-leaving group bond. Therefore, the order of reactivity for alkyl halides is methyl > primary > secondary >>> tertiary.
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