Synthesis and characterization of [Hg(sulfamethoxazolato)2]•2DMSO and[Cu2(μ-CH3CO2)4(sulfamethoxazole)2]

[Hg(sulfamethoxazolato)(2)](2DMSO)-D-. (1) and [Cu-2(CH3COO)(4)(Sulfa-methoxazole)(2)] (2) can be obtained by the reaction of sulfamethoxazole with mercury acetate or copper acetate in methanol. The structures of the two complexes were characterized by single crystal X-ray diffractometry. Compound 1 consists of sulfamethoxazolato ligands bridging the metal ions building an unidimensional chain. Two solvent dimethylsulfoxide molecules are involved via N-(HO)-O-... hydrogen bridges. The mercury atom shows a linear primary coordination arrangement formed by two trans deprotonated sulfonamidic nitrogen atoms. The overall coordination around the metal atom may be regarded as a strongly distorted octahedron when the interactions of mercury with four sulfonamidic oxygen atoms [bond distances of 2.761(4) angstrom - 2.971(4) angstrom] are also considered to build an equatorial plane and the N1 and N1 ' atoms [bond distance of 2.037(5) angstrom] occupy the apical positions. Compound 2 is a dinuclear complex in which the copper ions are bridged by four syn-syn acetate ligands which are related by a symmetry centre located in the centre of the complex. Each copper atom presents a nearly octahedral coordination where the equatorial plane is formed by four oxygen atoms and an isoxazolic nitrogen atom and the second copper atom occupy the apical positions.