Question

Which of the following statements is not correct about $S_{N}2$reaction of alkyl halides?

• A. Nucleophile attacks the carbon from the side opposite to where the leaving group is attached.
• B. The bond formation and bond breaking take place in one step.
• C. The rate of reaction depends upon the concentration of nucleophile.
• D. $S_{N}2$mechanism is predominant in tertiary alkyl halides.

Answer 1

Answer: (D)

$S_{N}2$mechanism is predominant in tertiary alkyl halides.

Answer 2

Teritary allyl halides are the least reactive in $S_{N}2$reaction because bully group hinder the approaching nucleophiles.