title: Matched/Mismatched interaction of a cyclic hexapeptide with ion pairs containing chiral cations and chiral anions.
abstract: The binding of a chiral quaternary ammonium ion to a cyclopeptide containing aromatic amino acid subunits is affected not only by the configuration of the cation but also by the configuration of the chiral counterion. Analysis of the binding equilibria shows that complex formation involves interaction of the whole ion pair with the host indicating that steric requirements of the anion influence complex geometry and stability.
authors.affiliation: Fachbereich Chemie-Organische Chemie, Technische Universität Kaiserlautern, Erwin-Schrödinger-Strasse, D-67663 Kaiserslautern, Germany.
authors.forename: Guido
authors.initials: G
authors.lastname: Heinrichs
authors.forename: Stefan
authors.initials: S
authors.lastname: Kubik
authors.forename: Jérôme
authors.initials: J
authors.lastname: Lacour
authors.forename: Laurent
authors.initials: L
authors.lastname: Vial
mesh_terms: D000838:Anions / Q000737:chemistry; D002412:Cations / Q000737:chemistry; D008024:Ligands; D009682:Magnetic Resonance Spectroscopy; D015394:Molecular Structure; D010456:Peptides, Cyclic / Q000737:chemistry*; D000644:Quaternary Ammonium Compounds / Q000737:chemistry*; D013237:Stereoisomerism; D013816:Thermodynamics
chemical_list: D000838:Anions; D002412:Cations; D008024:Ligands; D010456:Peptides, Cyclic; D000644:Quaternary Ammonium Compounds