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How doesbenzene diazonium chloride react...

How doesbenzene diazonium chloride react with:
`Cu_2Br_2//HBr`

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When a diazonium salt solution is warmed with cuprous chloride `(Cu_(2)Cl_(2))` in HCl or cuprous bromide `(Cu_(2)Br_(2))` in HCl corresponding halide in formed.
`underset("Benzene diazonium chloride")(C_(6)H_(5)N_(2)Cl)overset(Cu_(2)Cl_(2)//HCl)rarrunderset("Chlorobenzene")(C_(6)H_(5)Cl)+N_(2)`
`underset("Benzene diazonium chloride")(C_(6)H_(5)N_(2)Cl)overset(Cu_(2)Br_(2)//HBr)rarrunderset("Bromobenzene")(C_(6)H_(5)Br)+N_(2)`
This reaction is known as Sandmeyer reaction.
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