Question

Which of the following reaction follows $S_{N}1$ mechanism?

• A. $\left(C H_{3}\right)_{3}C-CH_{2}Cl+CH_{3}OK$
• B. $\left(C H_{3}\right)_{2}CHCH_{2}Cl+KCN$
• C. $\left(C H_{3}\right)_{3}C-Cl+NaOH(aq.)$
• D. $\left(C H_{3}\right)_{2}CHI+H_{2}O$

Answer 1

Answer: (C)

$\left( CH _{3}\right)_{3} C - Cl \rightarrow\left( CH _{3}\right)_{3} C ^{+}+ Cl ^{-}$

$\left( CH _{3}\right)_{3} C ^{\oplus}+ NaOH \longrightarrow \left( CH _{3}\right)_{3} C - OH + Na ^{+}$

$3^{\circ}$ halides undergo reaction by $S _{ N } 1$ mechanism because of formation of stable carbocation.