μ-Phenolato-μ-acetato-bridged Dinuclear Copper(II) Complex with Dinucleating Schiff-base Ligand Having Three Phenolate Groups

Abstract

The μ-phenolato-μ-acetato-bridged dinuclear copper(II) complex with 2-(5-chloro-2-hydroxyphenyl)-1,3-bis(2-(5-chloro-2-hydroxybenzylideneamino)ethyl)imidazolidine (H₃L), [Cu₂(L)(μ-CH₃CO₂)], was synthesized. The crystal structure was determined by the single-crystal X-ray diffraction method at 293 K. The complex crystallized as [Cu₂(L)(μ-CH₃CO₂)]·CH₃CN·H₂O in the monoclinic space group P2₁/c with a = 9.088(6), b = 13.296(9), c = 29.20(2)Å, β = 95.131(13)°, V = 3514(4)ų, D_calcd = 1.520 g/cm³, Z = 4. The R1 [I > 2σ(I)] and wR2 (all data) values are 0.0512 and 0.1282, respectively, for all 8308 independent reflections. The two copper(II) atoms are bridged by phenolato-oxygen of L³⁻ and μ-acetato, where each copper(II) atom is further coordinated by phenolato-oxygen, imino- and imidazolidine-nitrogen atoms of L³⁻ in a meridional fashion to form a square-pyramidal geometry. The temperature dependence of the magnetic susceptibilities showed a ferromagnetic interaction with J = +4.3 cm⁻¹ between the two copper(II) atoms.