In general, if the atoms that make up the ring contain heteroatoms, such rings become heterocycles, and organic compounds containing heterocycles are called heterocyclic compounds. An article called Polymerization of vinyl acetate initiated by hydrosilane in the presence of platinum complex, published in 2021, which mentions a compound: 12080-32-9, Name is Dichloro(1,5-cyclooctadiene)platinum(II), Molecular C8H12Cl2Pt, Quality Control of Dichloro(1,5-cyclooctadiene)platinum(II).
In this work, a series of hydrosilanes including phenylsilane, diphenylsilane, triethylsilane (TES), and tris(trimethylsilyl)silane combined with catalytical amount of platinum complex such as dichloro(1,5-cyclooctadiene)platinum (COD) and dichloro(dicyclopentadienyl)platinum have been used to initiate the polymerization of vinyl acetate (VAc) at 70-95°C. An ultrahigh mol. weight PVAc with number-average mol. weight (Mn) up to 1.17 X 106 Da and polydispersity index (PDI) of 2.59 has been synthesized using TES as an initiator in the presence of 9.7 ppm of COD. A kinetic study indicates that the polymerization at VAc/TES/COD molar ratio = 3.0 X 105 : 60 : 1 smoothly reached 81.0% conversion in 28.0 h at 85°C, producing PVAc with Mn increasing linearly from 1.41 X 105 to 6.01 X 105 Da with the increase of monomer conversion. A mechanistic investigation revealed that COD was firstly reduced by reductive TES, producing Pt nanoparticles and corresponding silane radicals to initiate the polymerization of VAc.
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