Benzyl methacrylate (>98.0%) and tetraethylene glycol dimethyl ether were obtained from Tokyo Chemical Industry. Ethyl α-bromophenyl acetate (97%) and 1,2,4-trichlorobenzene were obtained from Acros Organics. Anhydrous iron(ii) bromide (98%) and iron(iii) bromide (98%) were obtained from Alfa Aesar. N,N-Dimethylformamide (>99%) and 1,3-dichlorobenzene (98%) were obtained from Fluka. Tetrabutylammonium bromide (99%) and anisole (99%) were obtained from Sigma Aldrich and the polystyrene standard (average Mn 180 kDa) was purchased from Supelco. All chemicals were used as received, except the monomer that was passed through a column of basic alumina prior to usage.