Question

Which one of the following is more readily hydrolysed by $ S_{N}1 $ mechanism?

• A. $ (C_{6}H_{5})_{2} C (CH_{3}) Br $
• B. $ C_{6}H_{5}CH_{2}Br $
• C. $ C_{6}H_{5}CH(CH_{3})Br $
• D. $ (C_{6}H_{5})_{2} CHBr $

Answer 1

Answer: (A)

The order of reactivity of halides towards $S _{ N } 1$ reaction is

benzyl $>$ allyl $>3^{\circ}>2^{\circ}>1^{\circ}>$ Me

Therefore, the orrde of hydrolysis by $S _{ N } 1$ mechanism is