Dennehy Mariana, Delgado Fermín, Freire Eleonora, Halac Emilia, Baggio Ricardo
Departamento de Química (INQUISUR), Universidad Nacional del Sur, Bahía Blanca, Argentina.
Gerencia de Investigación y Aplicaciones, Centro Atómico Constituyentes, Comisión Nacional de Energía Atómica, Buenos Aires, Argentina.
Acta Crystallogr C Struct Chem. 2016 Jul 1;72(Pt 7):572-7. doi: 10.1107/S2053229616009645. Epub 2016 Jun 22.
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 Ag(I)-thiosaccharinate coordination polymer, namely poly[tris(μ2-4,4'-bipyridine-κ(2)N:N')bis(μ3-1,1-dioxo-1,2-benzisothiazole-3-thiolato-κ(3)N:S(3):S(3))bis(μ2-1,1-dioxo-1,2-benzisothiazole-3-thiolato-κ(2)S(3):S(3))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 Ag...Ag 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).
含硫供体配体的银（I）配合物具有广泛的药理应用。调节生物活性的最重要因素之一是供体原子的类型以及配体置换的难易程度。硫代糖精银呈现出从单核到多核配合物的多种结构。我们报道了一种二维Ag（I）-硫代糖精配位聚合物，即聚[三（μ2 - 4,4'-联吡啶-κ(2)N:N'）双（μ3 - 1,1-二氧代-1,2-苯并异噻唑-3-硫醇根-κ(3)N:S(3):S(3)）双（μ2 - 1,1-二氧代-1,2-苯并异噻唑-3-硫醇根-κ(2)S(3):S(3)）四银（I）]，[Ag2(C7H4NO2S2)2(C10H8N2)1.5]n的合成、晶体结构和振动光谱分析，其中4,4'-联吡啶作为间隔基。该结构的一个相关特征是存在异常短的Ag...Ag间距，为2.8859 (10) Å，处于亲银相互作用范围内，并通过低频光谱的拉曼分析得以证实。从拓扑学角度来看，该结构呈现出三重缠结的2D→2D网格形式的互穿（2D表示二维）。
