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- W2069065614 abstract "Absolute rate constants have been estimated for the transfer of chloride ligands from CuCl(OH2)5+, CuCl2(OH2)4 and CuCl3(OH2)3– to 2-benzoylphenyl radical in aqueous solution at ionic strength 5 mol dm–3 by comparison with its rate of cyclisation. The radical reacts with the monochlorocopper(II) complex with k=(8.8 ± 1.3)× 106 dm3 mol–1 s–1, but it does not discriminate between the di- and tri-chloro complexes, k=(1.0 ± 0.15)× 108 dm3 mol–1 s–1. Relative rate constants for the transfer of chloride and water ligands to a series of 2-, 3- and 4-substituted phenyl radicals have also been obtained; three copper complexes are implicated in chloride transfer for the conditions examined. Radicals with 3-and 4-substituents discriminate the monochlorocopper(II) complex from the two more highly chlorinated complexes, the discrimination increasing the more nucleophilic and reactive the radical. Radicals with strongly electron-withdrawing 2-substituents (CN, F) do not discriminate between any of the chlorocopper(II) complexes. A mechanistic rationale of the observations is proposed." @default.
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- W2069065614 date "1995-01-01" @default.
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- W2069065614 title "Sandmeyer reactions. Part 3. Estimation of absolute rate constants for the transfer of chloride ligands from Cu II to 2-benzoylphenyl radical (Pschorr radical clock) and further investigations of the relative rates of transfer of chloride and water ligands to other substituted phenyl radicals" @default.
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- W2069065614 doi "https://doi.org/10.1039/p29950002195" @default.
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