A series of iron complexes (FeX2,3, X = Cl, Br)/L with C (Cp2Fe2(I)(CO)4 &gt; Cp2Fe &gt; Fe(CO)5 &gt; (Ph2PCp)2Fe), N (phthalocyanine &gt;&gt; bpy &gt; MeO-bpy &gt;&gt; PMDETA &gt; phen), halide (FeXmY4-m/Bu4N, X, Y = Cl &gt;&gt; Br &gt; I), O (12-crown-4 &gt;&gt; 15-crown-5 &gt; dibenzo-18-crown-6) and P (P[Ph(OMe)3]3 &gt;&gt; PPh3) ligands were evaluated in the normal, ICAR, and photo-ATRP of butadiene (BD) initiated from bromoesters in toluene at 110 °C. Good polymerization control was observed in many cases and two clear trends i.e. P[Ph(OMe)3]3 &gt;&gt; Bu4NX &gt; crown ethers &gt; amines &gt; C-ligands and FeCl2,3 &gt;&gt; FeBr2,3 occur consistently across all polymerizations. Photoirradiation significantly improves the rate, conversion and chain end functionality albeit with a slight PDI increase.

Iron mediated butadiene-ATRP

256th National Meeting (2018)

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