Question

Which of the following will undergo a faster $S_{N}2$?.

• A. Both undergo $S_{N}2$ at the same rate
• B. I
• C. Neither I nor II
• D. II

Answer 1

The correct option is B

I

For $S_{N}2$, the ideal substrates are primary or methyl halides (X = Cl, Br, I). II is a secondary alkyl chloride whereas I is a primary substrate. Hence, I will undergo $S_{N}2$ at a much greater pace.