Abstract
The bis-sulfur-bridged copper(II) dimer [{CuL(HL)Cl}2] (HL = N-ferrocenecarbonyl-N′,N′-dimethylthiourea) has been synthesized and structurally characterized. The central copper(II) ion has a distorted tetrahedral environment with one chloride and three sulfur atoms derived from one terminal and two bridging acylthiourea ligands. The two sulfur atoms of both bridging ligands with two copper(II) ions form a strictly planar Cu2S2 bridging core including two short [2.3649 Å] and two longer Cu–S distances [2.4496 Å]. Dimers with this type of bridging are very scarce. Magnetic measurements showed antiferromagnetic coupling between the copper(II) centers through the sulfur bridges. The best fitting to the experimental magnetic susceptibilities gave g = 2.06, J = –196.3 cm–1.
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