Stereocontrol by a pair of epimeric sugar-derived ligands of the coordination sphere of copper(II) complexes.
A pair of novel C3-epimeric sugar-derived ligands (glycoligands) with a neutral N4O donor set was synthesized. Copper(II) complexes of both ligands were obtained and characterized by X-ray crystallography. Cyclic voltammetry, electron paramagnetic resonance, and UV-vis spectroscopies showed similar electronic properties. Mirror-image CD spectra were obtained for the Cu(II) d-d band, indicating an enantiomeric character of the coordination sphere, which has been rationalized structurally. This example shows the possible predetermination of stereochemistry for complexes by ligands based on a glycoscaffold.
Cisnetti
Federico
F
Institut de Chimie Moléculaire et des Matériaux d'Orsay (UMR CNRS 8182), Université Paris-Sud 11, 91405 Orsay Cedex, France.
Guillot
Régis
R
Thérisod
Michel
M
Desmadril
Michel
M
Policar
Clotilde
C
D002241:Carbohydrates / Q000737:chemistry*; D002942:Circular Dichroism; D003300:Copper / Q000737:chemistry*; D018360:Crystallography, X-Ray; D004578:Electron Spin Resonance Spectroscopy; D008024:Ligands; D008958:Models, Molecular; D015394:Molecular Structure; D013237:Stereoisomerism
D002241:Carbohydrates; D008024:Ligands; D003300:Copper