Crystal structure of poly[tetra-μ(2)-cyanido-1:2κ(8)N:C-bis-(dimethyl sulfoxide-1κO)diargentate(I)iron(II)].

In the title polymeric complex, [Fe{OS(CH(3))(2)}(2){Ag(CN)(2)}(2)], the Fe(II) cation is located at an inversion centre and is coordinated by four cyanide (CN(-)) anions and two dimethyl sulfoxide mol-ecules in a slightly compressed N(4)O(2) octa-hedral geometry, the Ag(I) cation is C-coordinated by two CN(-) anions in a nearly linear geometry. The CN(-) anions bridge the Fe(II) and Ag(I) cations to form a two-dimensional polymeric structure extending parallel to (102). In the crystal, the nearest Ag⋯Ag distance between polymeric sheets is 3.8122†(12)†à . The crystal studied was a twin with a contribution of 0.2108†(12) for the minor component.