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Ion-pair effects in the electrochemistry of aromatic compounds: Effects of metal ions and solvents on the polarographic reduction of quinones

✍ Scribed by Marek K. Kalinowski; Barbara Tenderende-Gumińska

Publisher
Elsevier Science
Year
1974
Weight
468 KB
Volume
55
Category
Article
ISSN
0022-0728

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✦ Synopsis

In the last decade several papers were published on the polarographic investigations of ion-pair formation in free radical anion metal cation systems. Polarographic studies of ion association were described with radical anions of quinones 1 3 nitrocompounds 4 6, benzaldehydes6 ketonesV-9 and azocompounds 1 o. The subsequent reactions of the ion pairs of some ketyls have been successfully investigated by Lasia 11.

Cyclic voltammetric and polarographic studies of ion pairs (quinone) T ... Me "+ type (Me "+ is the supporting electrolyte cation) in five formally aprotic solvents are reported in the present paper. In the absence of proton donors quinones reduce polarographically in two one-electron steps at different potentials (see e. 9. ref. 12 and references therein). The first step corresponds to the formation of the semiquinone radical anion Q+e,

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Effect of protic solvents on the polarog
Effect of protic solvents on the polarographic reduction of the alkali metal ions in hexamethylphosphoric triamide
✍ Sachiko Sakura; Heung Lark Lee; Taitiro Fujinaga 📂 Article 📅 1980 🏛 Elsevier Science 🌐 English ⚖ 295 KB

Sodium and lithium ions are not reduced at the dropping mercury electrode in hexamethylphosphoric triamide containing 0.05 mol dm-3 tetraethylammonium perchlorate while rubidium and caesium ions show diffusion controlled, l-electron reduction waves. Thereduction of potassium ion is partially kinetic