| 1 | Author
| Dietrich Wabner, Fritz Hindelang, Rainer Huss | Requires cookie* | | Title
| Eine Bleidioxid-Bezugselektrode A Lead Dioxide Reference Electrode  | | | Abstract
| For research work in nitric acid and during the deposition of lead dioxide from nitric baths a reference electrode has proven its value, which consists of a lead dioxide layer on a titanium carrier. Its potential against n.h.e. lies at 1.455 + 0.002 V in IN Pb(N03)2 + 0.1 N HNO3 at 295 K. This space-saving electrode can be used in the same electrolyte. It is stable against temperature variations and electronic control currents. | | |
Reference
| Z. Naturforsch. 33b, 1357—1359 (1978); eingegangen am 24. Juli 1978 | | |
Published
| 1978 | | |
Keywords
| Reference Electrode, Lead Dioxide, Nitric Acid | | |
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| default:Reihe_B/33/ZNB-1978-33b-1357.pdf | | | Identifier
| ZNB-1978-33b-1357 | | | Volume
| 33 | |
3 | Author
| Hans-Werner Frühauf, ErnstA. Koerner, Von Gustorf | Requires cookie* | | Title
| Elektronenübertragungsreaktionen, I Produktanalysen der Einelektronen-Oxidation von Olefinen mit Ferriin oder Bleidioxid in wäßriger und methanolischer Lösung Electron Transfer Reactions, I Product Analyses of One-Electron Oxidations of Olefins by Ferriin or Lead Dioxide in Aqueous and Methanolic Solutions  | | | Abstract
| The oxidation of the substituted ethylenes, 2,3-dimethylbutene-2 (1), 2-methylbutene-2 (8), and a-methylstyrene (13), by ferriin or lead dioxide in water and/or methanol has been studied. Product analyses of the reactions, which lead to kinetically controlled product distributions, showed that lead dioxide, just as ferriin, reacts as a one-electron-oxidant. The product distributions, which arise from further reactions of the primary intermediates. i.e. the radical cations formed via one-electron transfer, were found to depend on sub-stituents, acidity and solvent. The results are consistent with three separate reaction paths of the radical cation, each of which leads to specific products. The radical cation can either deprotonate, be nucleophilicly attacked by solvent, or lead to dimeric products. The first two possibilities only are observed in the oxidation of 1 and 8, while only the latter two are found in the oxidation of 13. | | |
Reference
| (Z. Naturforsch. 31b, 427—436 [1976]; eingegangen am 28. November 1975) | | |
Published
| 1976 | | |
Keywords
| One Electron Transfer, Ferriin, Lead Dioxide, Olefin Radical Cations, Product Analyses | | |
Similar Items
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| default:Reihe_B/31/ZNB-1976-31b-0427.pdf | | | Identifier
| ZNB-1976-31b-0427 | | | Volume
| 31 | |
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