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The macrocyclic and cryptate effect. 8. Complex formation of the cryptands (222), (222B), (222BB) and (222CC) with different cations in methanol solutions by H.-J. Buschmann is a Chemistry article available to read on EtoBox.

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The complexation reactions between the cryptands ( ), ( ), ( ) and (222CC) with mono-and bivalent cations in methanol solutions were studied by means of potentiometric and calorimetric methods. Stability constants and reactions enthalpies for the complexation of monovalent cations by the ligands ( ), ( ) and (222BB) are almost constant. However, large reductions in the complex stabilities of bivalent cations with these ligands can be observed. Only enthalpic factors cause these reductions. Differences between cations are responsible for these observations. A reduction in the values of the reaction enthalpy measured is found with all cations on comparison with all other macrobicyclic ligands in the case of the ligand (222CC).

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Author

H.-J. Buschmann

Publisher

Elsevier Science; Elsevier ; Elsevier BV (ISSN 0020-1693)

Published

1987

Language

EN

Field

Chemistry (Physical Sciences)