What is #"activated benzene"#?
I am guessing at what you mean.............
But activated benzene would be a benzene substituted by groups that would make the benzene more reactive than
For example, the reaction of benzene with bromine to give bromobenzene is relatively sluggish:
And usually some Lewis-acid catalysis is added in the form of a ferrous or ferric salt.
On the other hand, the reaction with a benzene substituted by an activating group, say
The aryl ring is thus