A novel octanuclear copper(II) compound: Synthesis, crystal structure and magnetic properties

The crystal structure of a novel octanuclear copper(II) complex containing the bidentate 1,10-phenanthroline ligand (phen) with cooperative carbonato and hydroxido bridging ligands, [Cu8(phen)12(μ3-OH)2(μ-OH)2(μ3-CO3)2](CF3SO3)8(DMF)2(H2O)0.5 (1) is described. The di-μ-hydroxidocopper(II) species play an important role for the apparent ferromagnetic interaction with the Cu-OH-Cu angles (θ) of 95.8(2)° and 93.5(1)°. The intra- and intermolecular π-π stacking interactions between pyridine groups of phen ligand stabilize the lattice structure. The spectroscopic properties (IR, reflectance and EPR spectra) and the magnetic susceptibility data of this compound are investigated.