Inorganic Chemistry, Vol.47, No.7, 2243-2245, 2008
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 CID spectra were obtained for the Cull 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.