title: Chiral spiro Cu(I) complexes. Supramolecular stereocontrol and isomerisation dynamics by the use of TRISPHAT anions.
abstract: Association of enantiopure TRISPHAT anion (1) with chiral spiro [Cu(LL')2] complexes (LL' = 2-R-phen, 2, 6-R-bpy, 3, and 2-iminopyridine, 4) leads to an efficient NMR enantiodifferentiation. Variable temperature 1H NMR spectroscopy has been used to determine the isomerisation kinetics of these pseudo-tetrahedral complexes and to evaluate their configurational stability; the latter depending on the structure of the diimine ligands. In the case of the 2-anthracenyl-phen derivative, a decent level of supramolecular stereocontrol was noted (d.e. up to 45%); the configuration of the complex being determined by electronic circular dichroism (ECD).
authors.affiliation: Department of Organic Chemistry, University of Geneva, Quai Ernest Ansermet 30, CH-1211, Geneva 4, Switzerland.
authors.forename: Virginie
authors.initials: V
authors.lastname: Hebbe-Viton
authors.forename: Valérie
authors.initials: V
authors.lastname: Desvergnes
authors.forename: Jonathan J
authors.initials: JJ
authors.lastname: Jodry
authors.forename: Christiane
authors.initials: C
authors.lastname: Dietrich-Buchecker
authors.forename: Jean-Pierre
authors.initials: JP
authors.lastname: Sauvage
authors.forename: Jérôme
authors.initials: J
authors.lastname: Lacour