## Abstract At pH ca. 4 the rate of oxidation of ascorbic acid and of phenylhydroxytetronic acid by nitrous acid in the presence of excess nitrite ions is found to be independent of reductone concentration. The rate law is k~2~ was evaluated both in water and in aqueous dioxan. Under the same cond
Über die Oxydation der Ascorbinsäure durch salpetrige Säure Teil VII. Die säurekatalysierte Reaktion in Deuteriumoxid
✍ Scribed by H. Dahn; Lotte Loewe
- Publisher
- John Wiley and Sons
- Year
- 1963
- Tongue
- German
- Weight
- 240 KB
- Volume
- 46
- Category
- Article
- ISSN
- 0018-019X
No coin nor oath required. For personal study only.
✦ Synopsis
Abstract
In the oxidation (= nitrosation) of ascorbic acid by the nitrous acidium ion 0,1 to 0,2 N aqueous acid, a solvent isotope effect k~D~/k~H~ = 1,8 was found.
📜 SIMILAR VOLUMES
## Abstract Addition of azide ions considerably slows down the oxidation of ascorbic acid by nitrous acid. At a pH of about 2 an approximately 10 fold excess of hydrazoic acid over ascorbic acid changes the rate law found in part III into This is identical with the rate law found in 0·1 to 0·5 M a
## Abstract At pH ca. 2 the oxidation of reductones by nitrous acid follows the rate law Both k and k were determined for ascorbic acids in water and in aqueous dioxan and for phenylhydroxytetronic acid in water. The reductonate anions are about 200 times more reactive than the acids in water and
## Abstract Oxidation of ascorbic acid by nitrous acid at pH 0 to 5 follows the stoechiometric equation: This was shown by potentiometric titration of the ascorbic acid and by gas analysis.