β-Cyclodextrin structure
γ-Cyclodextrin structure
In the above structures, the flexible 6-OH hydroxyl groups are shown in the trans (O5-C5-C6-O6 torsion) conformation forming linking hydrogen bonds around the bottom rim of the conical cavity. Usually, these O5-C5-C6-O6 torsions are found in the (+)-gauche or (-)-gauche conformations where they may hydrogen bond to the ring oxygen atom of the same glucose residue via a linked water molecule. Such regular linkages are destabilized by dipolar effects, readily dissociated in aqueous solution, and not found in cyclodextrin crystals.
These animations use Jmol: an open-source Java viewer for chemical structures in 3D. Use the mouse for control.
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This page was established in 2005 and last updated by Martin Chaplin on 2 August, 2021
