Copper(II) complex with salicylaldehyde N-(2-salicylideneiminoglutaryl)hydrazone: Synthesis and structure

Abstract

A copper(II) complex with salicylaldehyde N-(2-salicylideneiminoglutaryl)hydrazone (H4L) of the formula [Cu2L · 2Py]2 · 8H2O (I) was obtained and characterized by X-ray diffraction. The crystals are monoclinic, space group P21, a = 13.0663 A, b = 16.5553 A, c = 17.7650 A, β = 97.9420°; Z = 4. The complex is tetranuclear with a “dimer-of-dimers” structure in which the copper cations of two binuclear subunits are linked by phenoxy bridges. The EPR spectra of solutions of complex I show a superposition of two signals of four HFS lines (g 1 = 2.111, a 1 = 56.8 × 10−4 cm−1 and g 2 = 2.183, a 2 = 71.0 × 10−4 cm−1).