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The crystal structure of the 1:1 complex of beta-cyclodextrin with trans-cinnamic acid
A Kokkinou1, S Makedonopoulou, D Mentzafos
1Physics Laboratory, Agricultural University of Athens, Greece.
Carbohydrate Research
|October 12, 2000
Abstract:
The crystal structure of the 1:1 complex of beta-cyclodextrin (cyclomaltoheptaose) with trans-cinnamic acid was studied by X-ray diffraction. Two beta-cyclodextrin molecules related by a twofold crystal axis form dimers in the hydrophobic cavity of which, two guest molecules are entirely buried. The complex crystallizes in the monoclinic C2 space group with channel-type molecular packing. The oxygen atoms of the carboxylate group of the trans-cinnamic acid molecule form strong hydrogen bonds with two water molecules lying in the interdimeric space of the hydrophobic channel.