CPMAS Study of Ring Inversion of cis-Decalin in the Solid State when Complexed with β-Cyclodextrin

Helena Dodziuk; Mariusz Pietrzak

doi:10.1071/CH09525

RESEARCH ARTICLE

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CPMAS Study of Ring Inversion of cis-Decalin in the Solid State when Complexed with β-Cyclodextrin

Helena Dodziuk ^A ^B and Mariusz Pietrzak ^A

+ Author Affiliations

- Author Affiliations

^A Institute of Physical Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, 01-224 Warsaw, Poland.

^B Corresponding author. Email: dodziuk@ichf.edu.pl

Australian Journal of Chemistry 63(4) 709-711 https://doi.org/10.1071/CH09525
Submitted: 29 September 2009 Accepted: 24 January 2010 Published: 8 April 2010

Abstract

Cyclohexane rings in cis-decalin are known to invert at room temperature in the liquid state and in solution. However, according to conventional wisdom such a large amplitude movement should be frozen in the solid state. In this paper, cis-decalin buried inside the β-cyclodextrin cavity has been shown by variable temperature ¹³C CPMAS NMR to invert in the solid state even at room temperature.

Acknowledgements

We are grateful to Wacker, GmbH for the gift of β-cyclodextrin, to Dr M. Asztemborska for carrying out the complex crystallization, to Professor J. Lipkowski for allowing us to cite their preliminary results, and to Professor S. Szymanski for his remarks on the manuscript.

References

CPMAS Study of Ring Inversion of cis-Decalin in the Solid State when Complexed with β-Cyclodextrin

Abstract

Acknowledgements

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