Hemicucurbit[6]uril a Macrocyclic Ligand with Unusual Complexing Properties

Journal of inclusion phenomena - Tập 54 - Trang 181-185 - 2006
Hans-Jürgen Buschmann1, Achim Zielesny2, Eckhard Schollmeyer1
1Deutsches Textilforschungszentrum Nord-West e.V., Krefeld, Germany
2Department of Applied Natural Sciences, University of Applied Sciences Gelsenkirchen, Recklinghausen, Germany

Tóm tắt

The complex formation of the macrocyclic ligand hemicucurbit[6]uril with various salts has been studied in aqueous solution. Due to the low solubility of this ligand the formation of complexes results in an increase of the amount of ligand present in solution. From these measurements the stability constants of the complexes formed are calculated. Hemicucurbit[6]uril only forms cation complexes with cobalt(II), nickel(II) and the uranylion. All other cations examined e.g. silver(I), lead(II) and copper(II) do not form detectable complexes in aqueous solution. For a better understanding of the complexation behaviour some quantum mechanical chemical calculations are performed with Gaussian.

Tài liệu tham khảo

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