Complexation of Inorganic Anions with Heptakis(6-butylamino-6-deoxy)-β-cyclodextrin and Its Analogs in Acidic Media
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| 1) Faculty of Agriculture, Shimane University |
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(Received April 12, 1993)
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Heptakis(6-butylamino-6-deoxy)-β-cyclodextrin (2) forms 1 : 1 complexes with several inorganic anions in 0.10 mol dm−3 HCl or DCl at 25 °C. The binding constant for a complex of 2 with the SO42− ion was remarkably larger than those for complexes of 2 with univalent anions and those for complexes of the α- (1) and γ-cyclodextrin (3) analogs with the SO42− ion. The circular arrangement of the protonated amino groups in 2 may be advantageous for electrostatic interactions with the bivalent anion. |
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