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- Title
Anion Cryptates: Synthesis, Crystal Structures, and Complexation Constants of Fluoride and Chloride Inclusion Complexes of Polyammonium Macrobicyclic Ligands.
- Authors
Dietrich, Bernard; Dilworth, Brid; Lehn, Jean-Marie; Souchez, Jean-Paul; Cesario, Michèle; Guilhem, Jean; Pascard, Claudine
- Abstract
Three macrobicyclic octamines 1-3 and the macrotricyclic hexadecamine 14 have been synthesized. The octamines 1-3 bind anionic substrates when protonated. The stability constants of the complexes between the protonated forms of the macrobicyclic polyamines and halide anions have been determined by pH-metric measurements. The stability constants in H2O are very high; 1 in its hexaprotonated form binds F− with high selectivity (selectivity F−/Cl− > 108), while 3 exhibits strong stability constants for both F− and Cl−. Three X-ray structures have been obtained, one where F− is held inside the cavity of 1 · 6H+, one where Cl− is included in 3 · 6H+, and 3 · 6H+ where the cavity is empty.
- Publication
Helvetica Chimica Acta, 1996, Vol 79, Issue 3, p569
- ISSN
0018-019X
- Publication type
Article
- DOI
10.1002/hlca.19960790302