In agreement with predictions by the molecular orbital theory (LONGUET‐HIGGINS) 2‐amino‐diphenylene reacts with benzenediazonium ions in 3‐position.
Über die Natur der Protonabspaltung bei Azokupplungen. Zur Kenntnis der Kupplungsreaktion, 11. Mitteilung
✍ Scribed by Hch. Zollinger
- Publisher
- John Wiley and Sons
- Year
- 1955
- Tongue
- German
- Weight
- 499 KB
- Volume
- 38
- Category
- Article
- ISSN
- 0018-019X
No coin nor oath required. For personal study only.
✦ Synopsis
Abstract
- The catalytic effect of pyridine, of the three isomeric picolines and of 2,6‐lutidine on the coupling rate of 4‐chloro‐diazobenzene with 2‐naphthol‐6,8‐disulphonic acid has been measured.
📜 SIMILAR VOLUMES
## Abstract 1. The reaction rates of five azo couplings of substituted diazo‐benzenes with 2,6‐ and with 1,4‐naphtholsulphonie acid are measured at ionic strengths between 0,005 and 0,25.
## Abstract Diazo coupling of 4‐phenylazo‐resorcinol takes place in 2‐ or 6‐position, depending on the acidity of the medium. It is shown that this orientation phenomenon is not caused by hydroxyl ion catalysis, but by general base catalysis. It is probable that the diazo orientation in resorcinol
I n der 127. Mitteilung dieser Reihe konnte durch Umwandlung des Taraxasterols in Hetero-lupan2) gezeigt werden, dass das Taraxasterol der Lupeol-Betulin-Untergruppe der Triterpene angehort3). I n der vorliegenden Arbeit berichten wir iiber die Uberfiihrung des Hetero-betulins4) in Dihydro-taraxa~te