COPPER(II) COMPLEXES WITH AMINOSUGAR DERIVED SCHIFF-BASES AS LIGANDS

The reaction of cupric chloride with the Schiff base of methyl 2-amino -2-deoxy-beta-D-glucopyranoside with 2-hydroxynaphthaldehyde gave a co pper(II) complex which was characterized by cyclic voltammetry and by FT-IR and electronic spectroscopies. Circular dichroism spectra of thi s complex and the copper(II) complex with the D-glucosamine derived Sc hiff base exhibited Cotton effects in the d-d transition region, which is characteristic of a square planar copper(II) environment. The coor dination of the Schiff bases to the metal is through the enol-imine ta utomeric form. The participation of the hydroxyl groups of the sugar m oieties in the complexation is excluded. (C) 1998 Elsevier Science S.A . All rights reserved.