Binuclear Metal Complexes. XLI. Crystal Structure and Unusual Magnetic Property of Isothiocyanato{2-[2-(dimethylamino)ethylthio]ethanolato}copper(II)

A binuclear copper(II) complex, isothiocyanato{2-[2-(dimethylamino)ethylthio]ethanolato}copper(II), (Cu(CH3-nso)NCS), was prepared and characterized by elemental analysis, infrared and electronic spectra, magnetic susceptibility (90–300 K), and single-crystal X-ray diffraction. The complex exhibits a band at 25×103 cm−1 characteristic of alkoxo-bridged structure. The temperature dependence of the magnetic susceptibility is unusual and shows a dramatic change in the temperature range 240–180 K. The magnetic data were fitted to the Bleaney-Browers equation separately in the two temperature ranges (−2J=535 cm−1 for 300≥T≥240 K; −2J=595 cm−1 for 170≥T≥90 K).