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Zur Mikrotitration organischer Verbindungen: Teil II: Messung scheinbarer Dissoziationskonstanten in den Systemen Methylcellosolv/Wasser und Dimethylformamid/Wasser

✍ Scribed by W. Simon; E. Heilbronner

Publisher
John Wiley and Sons
Year
1955
Tongue
German
Weight
730 KB
Volume
38
Category
Article
ISSN
0018-019X

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✦ Synopsis

Abstract

Apparent pK‐values have been determined for benzoic acid, trans‐cinnamic acid, picric acid, o‐chloro‐benzoic acid, p‐nitro‐phenol, quinine, brucine, sym‐diphenyl‐guanidine, 1, 2, 3‐triphenyl‐guanidine and (−)‐ephedrine in the solvent systems methylcellosolve/water and dimethylformamide/water as a function of the relative composition of these systems. The reproducibility of these values for a given range of the most important variables has been determined.

📜 SIMILAR VOLUMES

Zur Mikrotitration organischer Verbindun
Zur Mikrotitration organischer Verbindungen. Teil III. Scheinbare Dissoziationskonstanten von Dicarbonsäuren in den Systemen Methylcellosolv/Wasser und Dimethylformamid/Wasser
✍ W. Simon; Doris Meuche; E. Heilbronner 📂 Article 📅 1956 🏛 John Wiley and Sons 🌐 German ⚖ 768 KB

## Abstract It is shown that the determination of apparent pK‐values of aliphatic dicarboxylic acids in the nonaqueous solvent systems methylcellosolve/water and dimethylformamide/water by a previously described micromethod yields thermodynamically undefined values, which however show the same rela

Zur Mikrotitration organischer Verbindun
Zur Mikrotitration organischer Verbindungen: Teil VIII: Scheinbare Dissoziationskonstanten yon Benzoesäuren, Phenolen und Benzolsulfonaniliden im System Methylcellosolve/Wasser
✍ W. Simon; A. Mörikofer; E. Heilbronner 📂 Article 📅 1957 🏛 John Wiley and Sons 🌐 German ⚖ 589 KB

## Abstract Apparent pK‐values have been determined for 56 aromatic acids in the solvent system methylcellosolve (80 wt.‐ %)/water (20 wt.‐ %) with a previously described fully automatic titration apparatus. The validity of the __Hammett__ equation was tested and found to express the experimental d