Question

Under identical conditions, the `S_(N^(1))` reaction will occur most efficiently with
A. Tert-butyl chloride
B. 1-chlorobutane
C. 2-methyl-1-chloropropane
D. 2-chlorobutane

Answer 1

Correct Answer - A
`underset("1-butyl chloride")(CH_(3)-underset(CH_(3))underset(|)overset(CH_(3))overset(|)(C)-Cl)`
`underset("1-chlorobuta ne")(CH_(3)-CH_(2)-CH_(2)-CH_(2)-Cl)`
`underset("2-methyl-1-chloroprop ane")(CH_(3)-underset(CH_(3))underset(|)(C)H-CH_(2)Cl)" "underset("2-chlorobutane")(CH_(3)-CH_(2)-underset(Cl)underset(|)(C)H-CH_(3))`.
As t-butyl chloride will form `3^(@)` carbocation which is most stable thus `S_(N^(1))` reaction will occur most efficiently with t-butyl chloride.