Supramolecular packing of alkyl substituted Janus face all- cis 2,3,4,5,6-pentafluorocyclohexyl motifs

This study uses X-ray crystallography, theory and Langmuir isotherm analysis to explore the conformations and molecular packing of alkyl all- 2,3,4,5,6-pentafluorocyclohexyl motifs, which are prepared by direct aryl hydrogenations from alkyl- or vinyl-pentafluoroaryl benzenes. Favoured conformations...

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Veröffentlicht in:Chemical science (Cambridge) 2021-07, Vol.12 (28), p.9712-9719
Hauptverfasser: Clark, Joshua L, Taylor, Alaric, Geddis, Ailsa, Neyyappadath, Rifahath M, Piscelli, Bruno A, Yu, Cihang, Cordes, David B, Slawin, Alexandra M Z, Cormanich, Rodrigo A, Guldin, Stefan, O'Hagan, David
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container_end_page 9719
container_issue 28
container_start_page 9712
container_title Chemical science (Cambridge)
container_volume 12
creator Clark, Joshua L
Taylor, Alaric
Geddis, Ailsa
Neyyappadath, Rifahath M
Piscelli, Bruno A
Yu, Cihang
Cordes, David B
Slawin, Alexandra M Z
Cormanich, Rodrigo A
Guldin, Stefan
O'Hagan, David
description This study uses X-ray crystallography, theory and Langmuir isotherm analysis to explore the conformations and molecular packing of alkyl all- 2,3,4,5,6-pentafluorocyclohexyl motifs, which are prepared by direct aryl hydrogenations from alkyl- or vinyl-pentafluoroaryl benzenes. Favoured conformations retain the more polar triaxial C-F bond arrangement of the all- 2,3,4,5,6-pentafluorocyclohexyl ring systems with the alkyl substituent adopting an equatorial orientation, and accommodating strong supramolecular interactions between rings. Langmuir isotherm analysis on a water subphase of a long chain fatty acid and alcohol carrying terminal all- 2,3,4,5,6-pentafluorocyclohexyl rings do not show any indication of monolayer assembly relative to their cyclohexane analogues, instead the molecules appear to aggregate and form higher molecular assemblies prior to compression. The study indicates the power and potential of this ring system as a motif for ordering supramolecular assembly.
doi_str_mv 10.1039/d1sc02130c
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Favoured conformations retain the more polar triaxial C-F bond arrangement of the all- 2,3,4,5,6-pentafluorocyclohexyl ring systems with the alkyl substituent adopting an equatorial orientation, and accommodating strong supramolecular interactions between rings. Langmuir isotherm analysis on a water subphase of a long chain fatty acid and alcohol carrying terminal all- 2,3,4,5,6-pentafluorocyclohexyl rings do not show any indication of monolayer assembly relative to their cyclohexane analogues, instead the molecules appear to aggregate and form higher molecular assemblies prior to compression. 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subjects Assembly
Chemistry
Crystallography
Cyclohexane
Fatty acids
Isotherms
title Supramolecular packing of alkyl substituted Janus face all- cis 2,3,4,5,6-pentafluorocyclohexyl motifs
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