Reusable and environmentally friendly ionic trinuclear iron complex catalyst for atom transfer radical polymerization

Ionic iron complex [(Me(3)tacn)(2)Fe2Cl3](+)[(Me(3)tacn) FeCl3](-) ( 1), which is readily soluble in methanol, acted as a powerful catalyst in controlled radical polymerization of styrene and MMA, and showed promising features of removal from the resulting polymers and was reusable after recovery from the crude products.