Sai-Rong Fan

A mixed-valence CuII/CuI anion–cation complex: bis­[μ-5-sulfosali­cylato(3–)]bis­[(di-2-pyridylamine)­copper(II)] bis­[bis­(di-2-pyridyl­amine)copper(I)] dihydrate

The title compound, [CuII(2)(C7H3O6S)2(C10H9N3)2][CuI(C10H9N3)2]2.2H2O, consists of anionic CuII moieties, cationic CuI species and uncoordinated water molecules. The anionic dimeric unit consists of one crystallographically independent fully deprotonated 5-sulfosalicylate (2-oxido-5-sulfonatobenzoate) anion, a di-2-pyridylamine group and a CuII atom. Each CuII atom is five-coordinate within a square-pyramidal geometry. The anion lies on a special position of -1 site symmetry. In the cationic monomer, the CuI atom adopts tetrahedral geometry. The cations and anions are connected by O-H...O and N-H...O hydrogen bonds.

Poly[[tris(di-2-pyridylamine)tris(μ-5-sulfonatosalicylato)tricopper(II)] trihydrate]

In the title compound, [Cu3(C10H9N3)3(C7H3O6S)2]·3H2O, [Cu3(ssal)2(dpa)3] units (dpa is 2,2′-dipyridylamine and ssal is 5-sulfonatosalicylate) are found, which consist of one crystallographically independent ssal anion, and two each of crystallographically independent dpa ligands and Cu atoms, the unit lying on a twofold rotation axis. One Cu atom is four-coordinated by one dpa ligand and one ssal anion within a square-planar geometry, whereas the second Cu atom is coordinated by one dpa ligand and two ssal anions which are related by symmetry. The first Cu atom has one longer contact to one O atom of a symmetry-related sulfonate group and is, therefore, five-coordinated within a distorted square-pyramidal coordination. The [Cu3(ssal)2(dpa)3] units are connected via the sulfonate groups into layers which are parallel to the ab plane. These layers are further connected by O—H⋯O and N—H⋯O hydrogen bonding via the water molecules.