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- W4247150159 abstract "Individual steps in the reduction of chalcone at the dropping mercury electrode are expressed by scheme (A)−(U). The product of the first two-electron step is dihydrochalcone; in the second, alcohol is formed. Reduction of dihydrochalcone is governed by the rate of its general acid-base catalysed formation from the carbanion-enolate which is the primary electrolytic product. In the first one-electron step, an organomercury compound is formed. Reduction processes are accompanied by antecedent and interposed proton, transfers. For the protonation of the radical anion, [ArCO-CHCHAr](•), resulting in the chalcone reduction, an approximate value, pK6=10.2 was found and for that of the radical anion, [ArCOCH2CH2Ar](•), resulting in the dihydrochalcone reduction, an approximate value, pK9=8.75 was found. Radical anions react with alkali metal cations, but the waves of ketyls formed are not separated from those of radicals, resulting in analogous reactions with dydronium ions. The importance of using results obtained with controlled-potential electrolysis by means of a dropping mercury electrode rather than with a mercury pool electrode, for elucidation of polarographic processes, was stressed." @default.
- W4247150159 created "2022-05-12" @default.
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- W4247150159 date "1969-04-01" @default.
- W4247150159 modified "2023-09-26" @default.
- W4247150159 title "Polarographic reduction of aldehydes and ketones VIII. Polarographic behaviour of chalcone and dihydrochalcone" @default.
- W4247150159 doi "https://doi.org/10.1016/0368-1874(69)89018-0" @default.
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