Replacing

What do geologists call a benzene ring with iron atoms replacing the carbon atoms? A ferrous wheel.
What do chemists call a benzene ring with iron atoms replacing the carbon atoms?
A ferrous wheel.
What do you call a benzene ring where the iron atoms replacing all of the carbon atoms? A ferrous wheel.
What do you call a benzene ring where the iron atoms replacing all of the carbon atoms?
A ferrous wheel.