Abstract
Imidazolidine-2-thione (imdtH2) and copper perchlorate hexahydrate produced, from a refluxing mixture of ethanol and acetonitrile, a colourless, diamagnetic, homoleptic, dinuclear complex, [Cu2(imdtH2)6](ClO4)2, which crystallised in a monoclinic cell (a=8.0275(5), b=26.2252(14), c=8.5399(6) Å, β=91.707(5)°, space group P21/n, Z=2 (dimers), final R=0.0404 from 2699 observed reflections with F>4σc(F)). The structure is centrosymmetric with the copper(I) atoms pseudo-tetrahedrally coordinated by pairs of both terminal thione-S and asymmetric μ2-S bridging, imdtH2 ligands (CuS 2.284(1)–2.490(1) Å). Each ligand is trans-related to its partner across crystallographic symmetry centres consequently each copper(I) atom has an identical S4 donor set with angles at the metal ranging from 95.9(1) to 120.5(1)°. The strictly planar, centrosymmetric Cu2S2 core is rhomboid with CuSbr distances of 2.362(1) and 2.490(1) Å and CuSbrCu=67.2(1)° with CuCu and SbrSbr separation distances of 2.686(1) and 4.043(3) Å, respectively.
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