Which of the following reactant will not favour nucleophilic substitution reaction ?

Options

A.
B. Ph-Br
C. `CH_(3)overset(CH_3)overset(|)underset(CH_3)underset(|)C-CH_(2)-Br`
D. All the above

Answer

D

Explanation

`S_(N^1)` and `S_(N^2)` not possible in the following
Stearically crowded raction center for `S_(N^2)` and `S_(N^2)` not possible
Lone pairofBr in resonancewithBenzene ring. Hence partialdoublebond character. NO `S_(N^1)` or `S_(N^2)` possible.
`1^@ C^(oplus)` not stabel . Hence `S_(N^1)` not possible stearic crowded for
backside attack , Hence `S_N^2` not possible .