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- W2083669999 abstract "Tetraphenylhydrazin bildet in saurer Lösung abhängig von den Reaktionsbedingungen das Tetraphenylhydrazin-Radikalkation 51–6) oder das N.N.N′-Triphenyl-p-phenylendiamin-Radikalkation 10. Das komplexe ESR-Spektrum von 5 ließ sich durch Vergleich mit den ESR-Daten der Derivate 6 und 8 analysieren. Die Analyse ergab eine Nichtäquivalenz der o-Protonen, die durch eine behinderte Rotation der Arylreste verursacht wird. Bei den Hydrazinen 1–4 wurde nur bei 4 eine behinderte Rotation der Arylreste im NMR gefunden. The Tetraphenylhydrazine Radical Cation In acidic medium tetraphenylhydrazine yields either the tetraphenylhydrazine radical cation 51–6) or the N.N.N′-triphenyl-p-phenylenediamine radical cation 10, depending on the reaction conditions. It was possible to analyze the complex e.s.r. spectrum of 5 by comparising it with the e.s.r. spectra of the derivatives 6 and 8. This analysis showed a non-equivalence of the o-protons due to a hindered rotation of the aryl groups. N.m.r. studies of the hydrazines 1–4 showed that only 4 exhibits a hindered rotation of the aryl groups." @default.
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- W2083669999 date "1972-06-01" @default.
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- W2083669999 title "Über das Tetraphenylhydrazin‐Radikalkation" @default.
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- W2083669999 doi "https://doi.org/10.1002/cber.19721050631" @default.
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