Vinylmagnesium bromide

The 2,5-dibromo-3-hexylthiophene ≥ 97%, TCI (Tokyo, Japan), t-butylmagnesium chloride (2M ether solution) (Sigma Aldrich, St. Louis, MO, USA), dichloro-[1,3-bis(diphenylphosphino)propane]nickel(II) (Ni(dppp)Cl2) (≥97%, Sigma Aldrich), vinylmagnesium bromide (0.7 M solution in tetrahydrofuran, (Acros Organics Geel, Belgium), poly(methylhydrosiloxane) trimethylsilyl terminated (average M_n ~390—PMHS390—and 1700–3200—PMHS1700/3200, Sigma Aldrich), platinum(0)-1,3-divinyl-1,1,3,3-tetramethyldisiloxane (PTDD, Karstedt’s catalyst) (complex solution in xylene, Pt ~2%, Sigma Aldrich), poly(ethylene glycol) methyl ether methacrylate (PEG) (average Mn 500, Sigma Aldrich), anhydrous toluene (99.8%, Acros Organics) were used as received, without further purification. Anhydrous tetrahydrofuran (99.9%, Acros Organics) was distilled over metallic sodium prior to use. All reactions were conducted under dry nitrogen or argon flow, in oven-dried glassware.

2,5-dibromo-3-hexylthiophene ≥97%, TCI (Tokyo, Japan), [1,3-bis(diphenylphosphino)-propane]dichloronickel(II) (Ni(dppp)Cl₂, ≥97% Sigma Aldrich, St. Louis, MO, USA), vinylmagnesium bromide (0.7 M solution in tetrahydrofuran, Acros Organics (Geel, Belgium)), tert-butylmagnesium chloride (2 M solution in diethyl ether, Sigma Aldrich), anhydrous tetrahydrofuran (99.9%, Acros organics) distilled before use, poly(methylhydrosiloxane) trimethylsilyl terminated (average M_n = 390, Sigma Aldrich (Saint Louis, MO, USA)), poly(ethylene glycol) methyl ether methacrylate (average M_n = 500, M_n = 950 and M_n = 300, Sigma Aldrich), poly(ethylene glycol) methacrylate (average M_n = 500, Sigma Aldrich), platinum(0)-1,3-divinyl-1,1,3,3-tetramethyldisiloxane (PTDD, Karstedt’s catalyst) (complex solution in xylene, Pt ~ 2%, Sigma Aldrich), anhydrous toluene (99.85%, Acros Organics).