✦ LIBER ✦
Concave Reagents, 18. Synthesis, Conformational Behavior, and Basicity of New Pyridine-Bridged Calix[6]arenes
✍ Scribed by Ross, Haymo ;Lüning, Ulrich
- Publisher
- John Wiley and Sons
- Year
- 2006
- Tongue
- English
- Weight
- 777 KB
- Volume
- 1996
- Category
- Article
- ISSN
- 0947-3440
No coin nor oath required. For personal study only.
✦ Synopsis
Abstract
Compounds 2–6 were synthesized by starting from the pyridine‐bridged calix[6]arenes 1. Most of these derivatives exist in a concave conformation like their parent compounds 1, but in some cases the conformational behavior is different. Relative basicities of 1–6 and of the open‐chain model compounds 7 were measured by a photometrical titration against thymol blue. An unexpectedly high basicity of 1–4 was found.