Stability constants and derived Gibbs energies, enthalpies and entropies of complexation of D-monosaccharides with 2-and /I-cyclodextrinll in water at 298.1 5 < obtained by titration microcalorimetry are reported. The results show that x-cyclodextrin interacts with D-glucose. o-fructose, D-xylose, D-mannose and o-galactose. No heat was evolved with D-arabinose. However, /I-cyclodextrin is able to recognise aldopentoses (o-xylose and D-arabinose) but not aldohexoses. 13C NMR studies on these systems are discussed.

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