Crystal structure of a solvated dinuclear Cu(II) complex derived from 3,3,3',3'-tetraethyl-1,1'-(furan-2,5-dicarbonyl)bis(thiourea).

Reaction between equimolar amounts of 3,3,3',3'-tetraethyl-1,1'-(furan-2,5-dicarbonyl)bis(thiourea) (H(2)L) and CuCl(2)·2H(2)O in methanol in the presence of the supporting base Et(3)N gave rise to a neutral dinuclear complex bis-[μ-3,3,3',3'-tetraethyl-1,1'-(furan-2,5-dicarbonyl)bis(thioureato)]dicopper(II) di-chloro-methane disolvate, [Cu(2)(C(16)H(22)N(4)O(3)S(2))(2)]·2CH(2)Cl(2) or [Cu(2)(L)(2)]·2CH(2)Cl(2). The aroylbis(thio-ureas) are doubly deprotonated and the resulting anions {L (2-)} bond to metal ions through (S,O)-chelating moieties. The copper atoms adopt a virtually cis-square-planar environment. In the crystal, adjacent [Cu(2)(L)(2)]·2CH(2)Cl(2) units are linked into polymeric chains along the a-axis direction by inter-molecular coordinative Cu⋯S inter-actions. The co-crystallized solvent mol-ecules play a vital role in the crystal packing. In particular, weak C-H(furan)⋯Cl and C-H(eth-yl)⋯Cl contacts consolidate the three-dimensional supra-mol-ecular architecture.