The crystal structure of 25,27-dihydroxy-26,28-bis(diethoxyphosphoryloxy)-tert-butylcalix[4]arene (1) (hexane solvate, 1:1) was determined by x-ray crystallography. The crystal data are P2 1 /n, a = 12.652(1) A ˚, b = 12.564(2) A ˚, c = 18.781(4) A ˚, b = 105.56(1)°, V = 2876.0(8) A ˚3, Z = 2. In th
NMR and X-ray analysis of 25,27-dimethoxythiacalix[4]arene: unique infinite channels in the solid state
✍ Scribed by Pavel Lhoták; Lukáš Kaplánek; Ivan Stibor; Jan Lang; Hana Dvořáková; Richard Hrabal; Jan Sýkora
- Publisher
- Elsevier Science
- Year
- 2000
- Tongue
- French
- Weight
- 152 KB
- Volume
- 41
- Category
- Article
- ISSN
- 0040-4039
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✦ Synopsis
The conformational behaviour of 25,27-dimethoxythiacalix[4]arene was studied using NMR techniques and X-ray analysis. The title compound prefers a cone conformation in solution, while in the solid state it adopts a unique 1,2-alternate conformation thus creating a novel type of molecular channel held together by p-p interactions.
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