Protonierungs- und Deprotonierungskinetik des Systems Azulen-Azuleniumkation, ein Beitrag zur Kenntnis der Hammett'schen Ho-Aciditätsfunktion
✍ Scribed by P. Seiler; D. Werthemann
- Publisher
- John Wiley and Sons
- Year
- 1971
- Tongue
- German
- Weight
- 428 KB
- Volume
- 54
- Category
- Article
- ISSN
- 0018-019X
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✦ Synopsis
Using a flashphotolysis-method to evaluate the rates of the protonation of azulene and the deprotonation of azuleniumcation as a function of Ha thc validity of the Hammett Hafunction was examined. Using this technique it was possible to obtain information on the behaviour of the activity coefficients and to show that the He-acidityfunction of Reagan [l] is a better measure of the hydrogen activity than the Ha-function. The dependence of the deprotonation rate on Ha is explained as a consequence of the different behaviour of the activity coefficients of Hamnmett-indicators and azulene/azuleniumcation, respectively.