Question

Which of the following halides will be most reactive in `SN^(2)` reaction and `SN^(2)` reaction respectively?

A. `(I),(II)`
B. `(II),(I)`
C. `(I),(III)`
D. `(III),(I)`

Answer 1

Correct Answer - `c`
`(I) implies 1^(@)` allyic halide and less steric hindrance,m hence `SN^(2)`.
`(III) implies 3^(@)` allylic halide, most stable carbonium ion and hence `SN^(1)`.