## 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
Die Orientierung bei der Azokupplung von 2-Aminodiphenylen. 16. Mitteilung zur Kenntnis der Kupplungsreaktion
✍ Scribed by H. H. Bosshard; Hch. Zollinǵer
- Publisher
- John Wiley and Sons
- Year
- 1961
- Tongue
- German
- Weight
- 406 KB
- Volume
- 44
- Category
- Article
- ISSN
- 0018-019X
No coin nor oath required. For personal study only.
✦ Synopsis
In agreement with predictions by the molecular orbital theory (LONGUET‐HIGGINS) 2‐amino‐diphenylene reacts with benzenediazonium ions in 3‐position.
📜 SIMILAR VOLUMES
## Abstract 1. The kinetic hydrogen isotope effects of azo coupling reactions vary in dependence on three factors, namely the numerical values of k~2~, k~−1~ and [B] in the general kinetic equation for electrophilic aromatic substitutions: .
## Abstract 1. 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.
## Abstract 1. 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~,
## Abstract 1. The coupling rates of 11 substituted benzene diazonium ions with 2,6‐naphtylaminesulphonic acid and with 2,6‐naphtolsulphonic acid are measured under the same conditions (ionic strength =0·25; 20·0°C).
## 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.