The Crystal Structure and Magnetic Property of the Alkoxo-Oxygen Bridged Tetranuclear Copper(II) Complex, Cu4{(n-C3H7)2N(CH2)2O}4Cl4

The crystal structure of the alkoxo-oxygen bridged tetranuclear copper(II) complex, Cu4{(n-C3H7)2N(CH2)2O}4Cl4, has been determined from the three-dimensional X-ray diffraction method. The crystals are orthorhombic with the space group Pbcn. The cell dimensions are α=15.965 (4), b=14.941 (1), c=19.305 (2) A. The structure has been determined from the heavy atom method and refined by the block-diagonal least-squares method to give R=7.52%. The complex is of a cubane type structure formed by four copper and four alkoxide oxygen atoms. Each copper atom has a distorted square pyramidal environment. The correlation between the magnetic property and the structure was discussed on some homologous compounds of cubane structure.