Ncert Exercises & Solutions

Which of the compounds will react faster in $S_{N} 1$ reaction with the ${}_{-}O H$ E

ion? $C H_{3} — C H_{2} — C l o r C_{6} H_{5} — C H_{2} — C l$

S_{N} 1

mechanism will be dtermined upon the stability of carbocation which is formed as reaction intermediate in

this mechanism.

$C H_{2} — C H_{2} — C l w i l l f o r m C_{6} H_{5} C H_{2} c a r b o c a t i o n a s i n t r e m e d i a t e .$

Sincde this carbocation is stabilised by reasonance hence it will react faster in $S_{N} 1$ reaction.

While carbocation formed in $C H_{3} C H_{2} C l i s C H_{3} \overset{+}{C} H_{2}$ . This carbocation is compratively unstable and

not give SN1 reaction with $O H -$ ion.