Conformational properties of octahydroxy[1.4]metacyclophanes with unsubstituted methylene bridges
- 1 January 1993
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Journal of the Chemical Society, Chemical Communications
- No. 1,p. 34-35
- https://doi.org/10.1039/c39930000034
Abstract
Octahydroxy[1.4]metacyclophanes with long alkyl substituents on the aromatic rings have been prepared; the preferred conformation of the tetrahexyl derivative 8 in CDCl3 is a cone and its free energy of activation, ΔG‡ 298, for the ring inversion has been determined to be 12.0 kcal mol–1(1 cal = 4.184 J) using dynamic 1H NMR spectroscopy and complete line shape analysis.Keywords
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