## Abstract Thermodynamic p__K__~a~โvalues have been determined for 38 4โsubstituted quinuclidinium perchlorates. They are remarkably sensitive to the polar effect of the substituent and cover a range of 3.63 p__K__~a~ units. Furthermore, they vary linearly and almost equally with temperature since
โฆ LIBER โฆ
4-Substituted Quinuclidinium Perchlorates as Models for the Determination of Polar Substituent Effects
โ Scribed by Prof. Cyril A. Grob; Werner Simon; Dieter Treffert
- Publisher
- John Wiley and Sons
- Year
- 1973
- Tongue
- English
- Weight
- 113 KB
- Volume
- 12
- Category
- Article
- ISSN
- 0044-8249
No coin nor oath required. For personal study only.
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## Abstract A series of 10โsubstituted(X)โ9โtrimethylstannyltriptycenes (2a) were synthesized and characterized and the ^119^Sn chemical shifts measured. Comparisons were made of the ^119^Sn substituent chemical shifts (SCS) of 2a and the corresponding values of 4โsubstituted(X)bicyclo[2.2.2]octโ1โ