The crystal and molecular structure of NaAgS2O3H2O

Abstract

NaAgS₂O₃H₂O monoclinic, Pc: a = 7.78(1), b = 9.07(1), c = 7.71(1) Å, β = 96.3†(.2†), Z = 4. The crystal structure has been determined at a room temperature from three-dimensional X-ray photographic data and defined by differential methods using anisotropic thermal parameters; final R = 10.8%. In the asymmetric unit there are two independent silver atoms both tetrahedrally surrounded by three sulphur atoms from three thiosulphate groups and by one oxygen atom from the water molecule. Each thiosulphate group behaves as a monodentate ligand through the external sulphur which coordinates to three adjacent silver atoms (Ag(1)S = 2.48, 2.54, 2.60 Å; Ag(2) S = 2.52, 2.52, 2.65, Å) so that the coordination polyhedra result linked in layers running parallel to (010). These layers are joined together by sodium atoms which interact, in a distorted octahedral environment, with the oxygen atoms