Complex of Cu~(II) with a chiral Schiff base (H2L) derived from the natural monoterpene (+)-α-pinene. Synthesis and the properties of the complex and its solvate with acetonitrile. Crystal structure of [Cu(HL)Cl]·H2O

摘要

A reaction of CuCl2 with a chiral Schiff base (H2L) derived from (+)-α-pinene leads to paramagnetic complex Cu(HL)Cl (1) (μ_(eff) = 2.03 μ_B) and solvate Cu(HL)Cl·MeCN (2) (μ_(eff) = 1.87 μ_B). Monocrystals of hydrate [Cu(HL)Cl]·H2O (3) were grown for the X-ray diffraction study, which showed that the crystal structure of 3 consists of the molecules of a mononuclear complex [Cu(HL)Cl] containing tridentate chelating ligand HL~-, and water molecules. Coordination polyhedron ClNO2 is a distorted tetrahedron. Intermolecular contacts in the structure 3 lead to the formation of supramolecular chains, parallel to the axis a. Compounds 1 and 2 were studied by ESR and IR spectroscopy.