Binuclear Metal Complexes. XXXIII. Synthesis, Structure, Spectra, and Magnetism of Binuclear Copper(II) Complexes with 2-[2-(Dialkylamino)ethylthio]ethanol

Binuclear copper(II) complexes with 2-[2-(dialkylamino)ethylthio]ethanol, Cu{R2N(CH2)2S(CH2)2O}X (abbreviated as Cu(R-nso)X, where R=CH3, C2H5, n-C3H7, n-C4H9; X=Br, Cl, NO3), were prepared and characterized by elemental analyses, infrared and electronic spectra and magnetic susceptibilities (80–300 K). They exhibit a band at 22–26×103 cm−1 characteristic of alkoxo-bridged structure. The magnetic data of Cu(n-C4H9-nso)Cl indicate that a strong antiferromagnetic interaction is operating between the copper ions. However, temperature dependence of magnetic susceptibilities of the other complexes do not obey the equation based on a binuclear structure. The crystal structure of Cu(CH3-nso)Br was determined by the single-crystal X-ray diffraction method. The crystals are monoclinic, space group P21/c, a=10.133(2), b=7.858(2), c=14.893(3) A, β=118.8(1)°, and Z=2. The structure was solved by the heavy atom method and refined by the block-diagonal least-squares method to an R factor of 0.042. The structure consist...

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