Binuclear Metal Complexes. XIII. Syntheses and Magnetic Properties of Thiocyanato-Bridged Binuclear Copper(II) Complexes

Three binuclear copper(II) complexes, Cu2(fsal-NMe2)(NCS)3, Cu2(fsal-NEt2)(NCS)3 and Cu2(fsal-pa)(NCS)3, have been synthesized and characterized, where Hfsal-NMe2, Hfsal-ENt2 and Hfsal-pa denote the Schiff bases prepared by the condensation reaction of 2,6-diformyl-4-methylphenol with N,N-dimethylethylenediamine, N,N-diethylethylenediamine and 2-pyridylmethylamine, respectively. It was demonstrated that the complexes essentially consist of a binuclear unit of the thiocyanato-bridged skeleton, (Remark: Graphics omitted.). The cryomagnetic properties could be explained on the basis of the equation for the tetranuclear cluster formed with two binuclear units linked by the out-of-plane bonding. The magnetisms and structures of the complexes were discussed in comparison with those of the Cu2(fsal–NR2)X3 (X=Cl, Br).

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