The effects of perfluorination on carbohydrate-π interactions

Computational studies of the interaction of benzene and hexafluorobenzene with fucose and cyclodextrin

Rajesh K. Raju, Ian H. Hillier, Neil A. Burton, Mark A. Vincent, Slimane Doudou, Richard A. Bryce

Research output: Contribution to journalArticle

22 Citations (Scopus)

Abstract

The effect of benzene fluorination on C-H⋯π interactions is studied using a number of computational methods applied to a range of intermolecular complexes. High level wavefunction methods (CCSD(T)) predict a slightly greater interaction energy for complexes of benzene with methane or fucose, compared to corresponding complexes involving hexafluorobenzene. A number of more approximate treatments, DFT with the M06-2X functional, PM3-D* and MM methods, give interaction energies within 1 kcal mol -1 of the high level values, and also correctly predict that the interaction energy is slightly greater for benzene compared to hexafluorobenzene. However, the DFT-D model used here predicts that the interaction energy is slightly greater for hexafluorobenzene. Molecular dynamics simulations, employing the GLYCAM-06 force field, validated here, are used to model the complexes of benzene and hexafluorobenzene with β-cyclodextrin in aqueous solution. We predict the binding free energies of the complexes to be within 0.5 kcal mol-1, and suggest that the different chemical shifts of the H5 protons observed in the two complexes arise from their slightly different structures, rather than from different binding energies.

Original languageEnglish
Pages (from-to)7959-7967
Number of pages9
JournalPhysical Chemistry Chemical Physics
Volume12
Issue number28
DOIs
Publication statusPublished - 28 Jul 2010
Externally publishedYes

Fingerprint

Fucose
carbohydrates
Cyclodextrins
Benzene
benzene
Carbohydrates
Discrete Fourier transforms
interactions
Fluorination
Halogenation
Methane
Chemical shift
Molecular Dynamics Simulation
Wave functions
Computational methods
Binding energy
fluorination
energy
Free energy
Molecular dynamics

ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry

Cite this

The effects of perfluorination on carbohydrate-π interactions : Computational studies of the interaction of benzene and hexafluorobenzene with fucose and cyclodextrin. / Raju, Rajesh K.; Hillier, Ian H.; Burton, Neil A.; Vincent, Mark A.; Doudou, Slimane; Bryce, Richard A.

In: Physical Chemistry Chemical Physics, Vol. 12, No. 28, 28.07.2010, p. 7959-7967.

Research output: Contribution to journalArticle

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