Cyclopentadienyliron complexes methacrylates

The synthesis of cationic organoiron containing polymethacrylates and polystyrenes has been reported. The radical polymerization of methacrylate and styrene monomers containing cationic cyclopentadienyliron complexes produced polymers with cationic cyclopentadienyliron complexes in their side chains (Scheme 2.57).265,266 Monomer 216 and polymer 217 were both redox active and underwent reversible reduction processes. An organic analog of the cationic organoiron polymer was obtained by photolytic cleavage of the cationic cyclopentadienyliron... 

The design of diiron complexes functionalized with methacrylate units was also achieved using complex 9. The synthesis of complex 9 was previously reported by the reaction of the 1,4-dichlorobenzene complex of cyclopentadienyliron with 4,4-to(4-hydroxyphenyl)valeric acid. Scheme 3 shows the synthesis of monomer 11 via condensation of an acid chloride complex (10) with 2-hydroxyethyl methacrylate (5). Monomer 11 was isolated as a yellow precipitate in excellent yield. 

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