The reaction `Aroverset(ɵ)(N)_(2)overset(o+)(C )l+Cu + HCl rarr ArCl + Na_(2) + CuCl` is known as

Options

A. Swarts reaction
B. Gatterman reaction
C. Sandmeyer reaction
D. Stephen reaction

Answer

B

Explanation

The reaction,
`Aroverset(+)(N)Cl^(-) + Cu + HCl rarr ArCl + N_(2) + CuCl` is known as Gattermann reaction where diazonium salt reacts with copper metal in present of HCl to give chlorobenzene. This reaction uses `ArSN_(1)` mechanism where diazonium group is a good leaving group that departs leading to phenyl carbocation formation which is very unstable and then the `Nu^(Θ), Cl` attacks the phenyl carbocation giving chlorobenzene.