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Zur Mikrotitration organischer Verbindungen. Teil III. Scheinbare Dissoziationskonstanten von Dicarbonsäuren in den Systemen Methylcellosolv/Wasser und Dimethylformamid/Wasser

✍ Scribed by W. Simon; Doris Meuche; E. Heilbronner

Publisher
John Wiley and Sons
Year
1956
Tongue
German
Weight
768 KB
Volume
39
Category
Article
ISSN
0018-019X

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✦ Synopsis

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 relative trend as thermodynamical pK‐values measured in water. They are therefore liable to be correlated with the structure of acids by the usual semiquantitative rules.

📜 SIMILAR VOLUMES

Zur Mikrotitration organischer Verbindun
Zur Mikrotitration organischer Verbindungen: Teil II: Messung scheinbarer Dissoziationskonstanten in den Systemen Methylcellosolv/Wasser und Dimethylformamid/Wasser
✍ W. Simon; E. Heilbronner 📂 Article 📅 1955 🏛 John Wiley and Sons 🌐 German ⚖ 730 KB

## 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 dimethylformam

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