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Article Dans Une Revue Polyhedron Année : 2011

Ditopic binding of cyclodextrin-included ligands in trigonal silver(I) complexes

Dominique Matt
Laurent Poorters
  • Fonction : Auteur
Loic Toupet

Résumé

The X-ray crystal structures of trigonal silver(1) cyclodextrin complexes of introverted bidentate sulfur (1) and phosphorus (2) ligands give a clear indication on how a cyclodextrin-included ligand may bind in a ditopic fashion both the encapsulated metal ion and the cyclodextrin inner wall. In the solid state, the silver-coordinated water molecule of complex [Ag(H2O)(1)]BF4 induces a major distortion of the macrocyclic structure, along with dramatic conformational changes in the two opposite glucose units with which it is hydrogen bonded. In complex [AgBr(2)], the included bulky bromide anion, which lacks hydrogen bonding capability, does not affect the overall circular shape of the cyclodextrin receptor. A H-1-F-19 HOESY experiment conducted on the silver(I) complex of 1 in CDCl3 showed that in this solvent, the water molecule is displaced by the BF4 counterion at the metal coordination site, the cavity being here no longer distorted. (C) 2010 Elsevier Ltd. All rights reserved.

Dates et versions

hal-01068812 , version 1 (26-09-2014)

Identifiants

Citer

Dominique Armspach, Dominique Matt, Laurent Poorters, Rafael Gramage-Doria, Peter Jones, et al.. Ditopic binding of cyclodextrin-included ligands in trigonal silver(I) complexes. Polyhedron, 2011, 30 (4), pp.573-578. ⟨10.1016/j.poly.2010.11.014⟩. ⟨hal-01068812⟩
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