Hexaaquacadmium(II) bis{[N-(2-oxidobenzylidene)glycyl-L-leucinato]cuprate(II)} dihydrate

Abstract

The title compound, [Cd(H2O)6][Cu(C15H17N2O4)]2·2H2O, has a chiral structure. Copper has a square-planar coordination with two N and two O atoms of the quadridentate chiral Schiff base ligand. The Cd2+ ion is coordinated by six aqua ligands with a slightly distorted octa­hedral configuration. Ions are linked by O—H⋯O hydrogen bonds, and the [Cd(H2O)6]2+ cations and [CuL]− anions (L = Schiff base derived from glycyl-l-leucine and salicylaldehyde) occupy a stacking structure within well separated columns along the a axis. The two crystallographically independent copper–Schiff base anions each have a chiral carbon centre with an S configuration. They are related by a non-crystallographic twofold rotation axis parallel to the [010] direction.