Redox transfer. Part IX. Chlorination of olefins by copper(II) chloride

Or, Amos; Levy, Moshe; Asscher, M.; Vofsi, D.

doi:10.1039/p29740000857

Cited by 3 publications

(1 citation statement)

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“…However, from the mechanistic point of view, oxidation of Cu(II) by O 2 is not possible, since Cu(II) is air‐stable. Alternatively, initiation could occur via 1,2‐dihalo adduct formed by the reaction of CuX 2 with a vinyl monomer as reported earlier 32. To corroborate this result, bulk MMA was reacted with excess solid CuBr 2 at 110 °C.…”

Section: Discussionsupporting

confidence: 52%

Concurrent Initiation by Air in the Atom Transfer Radical Polymerization of Methyl Methacrylate

Nanda

Hong

Matyjaszewski

2003

Macro Chemistry & Physics

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The effect of air in atom transfer radical polymerization (ATRP) of methyl methacrylate (MMA) was studied. Air initiated polymerization was clearly noticed by the appearance of a low molecular weight peak in the synthesis of high molecular weight poly(isobutylene)‐graft‐poly(methyl methacrylate) (Mn = 5.0 × 105 g/mol). The concentration of chains initiated by oxygen (air) was ≈8 × 10−4 mol/L, determined using the Gladstone‐Dale relationship. The tentatively proposed mechanism for air initiated polymerization was supported by kinetic studies. Similar to typical ATRP systems, the rate of air initiated polymerization increased with temperature, [MMA], amount of air, and activity of the catalyst complex. Polymers with lower polydispersities (Mw/Mn = 1.13) were obtained in the presence of Cu(II) as compared to Cu(I) catalyst complex system.

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Section: Discussionsupporting

confidence: 52%