Complex of CuII with a chiral Schiff base (H2L) derived from the natural monoterpene (+)-6h-pinene. Synthesis and the properties of the complex and its solvate with acetonitrile. Crystal structure of [Cu(HL)Cl]•H2O

Abstract

A reaction of CuCl 2 with a chiral Schiff base (H 2 L) 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]•H 2 O (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 ClNO 2 is a distorted tetrahedron. Intermolecular con tacts 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.