catena-Polytetra­kis­(hexa­methyl­phospho­ramide-κO)bis­(nitrato-κ2 OO′)samarium(III) silver(I)-di-μ-sulfido-tungstate(VI)-di-μ-sulfido

摘要

The Sm atom in the cation of the title salt, {[Sm(NO3)2(C6H18N3OP)4][AgS4W]}n, is coordinated by eight O atoms derived from two chelating nitrate anions, and four hexamethylphos­phoramide ligand, defining a distorted square-antiprismatic geometry. The anions self-assemble into polymeric chains via W—S—Ag bridges having a [AgS4W] repeat unit; the W—Ag—W and Ag—W—Ag angles are 161.657 (17) and 153.978 (9)°, respectively. The title complex is isostructural with the Y, Yb, Eu, Nd, La and Dy isomorphs.