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Pulsradiolytische Beobachtungen über die Reduktion des NO3−‐Ions und über Bildung und Zerfall der persalpetrigen Säure in wäßriger Lösung

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Grätzel, M., Henglein, A., Taniguchi, S.·1970·Berichte der Bunsengesellschaft für physikalische Chemie

Abstract

Das Nitration reagiert mit dem hydratisierten Elektron zu NO 32‐. Dieses Teilchen absorbiert maximal bei 2500 Å mit = 3,1 ± 10 3 M−1 cm−1. Seine Leitfähigkeit beträgt 137 Ω−1 cm 2 mol−1. In alkalischer Lösung verschwindet es mit δ1/2 = 12,5 μs nach: NO 32‐ + H 2 O ± NO 2 + 2 OH−. In saurer Lösung nimmt es Protonen auf bis zur Erreichung der Gleichgewichte: Das OH‐Radikal reagiert mit NO 2 zu persalpetriger Säure, HO 2 NO, mit k = 1,3 · 10 9 M−1 s−1. Der pK‐Wert der persalpetrigen Säure wurde zu 5,3 bestimmt. HO 2 NO verschwindet nach erster Ordnung aus der Lösung, indem sich die undissoziierte Form spontan zu Salpetersäure, HNO 3, umlagert, während das Anion der persalpetrigen Säure stabil ist. Die Geschwindigkeitskonstante der Isomerisierung

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Authors
Grätzel, M., Henglein, A., & Taniguchi, S.
Venue
Berichte der Bunsengesellschaft für physikalische Chemie
Publisher
Wiley
Published
1970-03
Volume
74
Issue
3
Pages
292-298
ISSN
0005-9021 (ISSN-L)
OpenAlex
W135372508
Cited by
190
References
0
FWCI
6.55
Type
journal article
Language
en
Open access
green

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