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Kinetischer Isotopeneffekt und Isomerenverhältnis bei der Kupplung von deuterierter 1-Naphtol-3-sulfosäure. 15. Mitteilung zur Kenntnis der Kupplungsreaktion

✍ Scribed by R. Ernst; O. A. Stamm; Hc H. Zollinger

Publisher: John Wiley and Sons
Year: 1958
Tongue: German
Weight: 322 KB
Volume: 41
Category: Article
ISSN: 0018-019X
DOI: 10.1002/hlca.19580410739

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✦ Synopsis

Abstract

Diazo couplings of 4‐chlorodiazobenzene with [2:4‐di‐D]‐1‐naphtol‐3‐sulphonic acid show an isotope effect (k~H~/K~D~ = 3·1) which is smaller than the isotope effect of the analogous reaction with 2‐naphtol‐6:8‐disulphonic acid. These differencies are explained as a function of k~−1~, i.e. the rate of the reverse reaction of the first step. This constant is influenced by the different steric conditions in the intermediates of the reactions.

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Stereochemie der Ringöffnung der σ-Kompl

Stereochemie der Ringöffnung der σ-Komplexe von 2-Naphtol-1-sulfonsäure mit Diazoniumsalzen und der anschliessenden Phtalazinbildung: Eine fragmentierung als konkurrenzreaktion der abspaltung der abgangsgruppe bei der elektrophilen substitution 25. Mitteilung zur Kenntnis der Azokupplung

✍ A. P. Jaecklin; P. Skrabal; H. Zollinger 📂 Article 📅 1971 🏛 John Wiley and Sons 🌐 German ⚖ 1020 KB

## Abstract The reaction of 2‐naphthol‐1‐sulfonic acid with diazonium salts was investigated in the pH range 10 to 15. The structures postulated for the reaction products by __Rowe et al.__ [3] and by __Koller__ [4] were proved by instrumental analysis. In alkaline solutions, instead of the usual d