Cholorobenzene is formed by reaction of chlorine with benzene in the presence of `AlCl_(3)`. Which of the following species attacks the benzene ring in this reaction?

Options

A. `Cl^(-)`
B. `Cl^(+)`
C. `AlCl_3`
D. `[AlCl_4]^(-)`

Answer

B

Explanation

In this reaction, `AlCl_3` is a catalyst which activate the chlorine molecule to show heterolytic cleavage. `AlCl_3` is electron deficient molecule and form `AlCl^(-)""_4` and `Cl^(+)` when reacts with `Cl_2` . This `Cl^(+)` electrophile attacks on electron rich benzene ring.
`AlCl_3+Cl_2 rarr [AlCl_4]^(-)+Cl^(+)`