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"A polymeric silver thiosaccarinate complex with a two-dimensional triply entangled mesh and argentophilic interactions"
Mariana Dennehy, Fermín Delgado, Eleonora Freire, Emilia Halac and Ricardo Baggio
Acta Cryst. C 72(7) (2016) 572-577
Silver(I) complexes with sulfur-donor ligands have a broad range of pharma­cological applications. One of the most important factors for tuning the biological activity is the type of donor atom and the ease of ligand replacement. Silver thio­saccharinates display a wide range of structures from mono- to polynuclear complexes. We report the synthesis, crystal structure and vibrational spectroscopic analysis of a two-dimensional AgI-thiosaccharinate coordination polymer, namely poly[tris­(μ2-4,4′-bipyridine-κ2N:N′)bis­(μ3-1,1-dioxo-1,2-benzisothiazole-3-thiolato-κ3N:S3:S3)bis­(μ2-1,1-dioxo-1,2-benzisothiazole-3-thiolato-κ2S3:S3)tetrasilver(I)], [Ag2(C7H4NO2S2)2(C10H8N2)1.5]n, with 4,4′-bipyridine acting as a spacer. A relevant feature of the structure is the presence of an unusually short AgAg separation of 2.8859 (10) Å, well within the range of argentophilic inter­actions and confirmed as such by Raman analysis of the low-frequency spectrum. From a topological point of view, the structure presents inter­penetration in the form of a threefold entangled 2D  2D mesh (2D is two-dimensional).
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