Which of the following statement is correct for the reactivity in SN2 reaction?

Question

Which of the following statement is correct for the reactivity in SN2 reaction? (A) Option 1

is more reactive than Option 1

(B)

is more reactive than Option 2

(C)

is more reactive than Option 3

(D)

is more reactive than Option 4

Tardigrade Admin · Accepted Answer

The electronegativity order of hybridized carbons is

s p > s p^{2} > s p^{3}

. So in an allylic halide, such as

C H_{2} = C H - C H_{2} - I

, the alpha carbon is much more partially positive than the alpha carbon in

C H_{3} - C H_{2} - C H_{2} I

. Therefore, the attacking nucleophile will be attracted to the alpha carbon more in the allylic halide compound than in the primary halide. Hence, allylic halides tend to follow

S_{N} 2

pathways more than primary halides.

Q. Which of the following statement is correct for the reactivity in SN​2 reaction?

is more reactive than

is more reactive than

is more reactive than

is more reactive than

Q. Which of the following statement is correct for the reactivity in $S_{N} 2$ reaction?