Article

Poly[[μ3-chlorido-bis(μ2-thiourea-κS)disilver(I)] nitrate]

Acta Crystallographica Section E 01/2010;
Source: DOAJ

ABSTRACT The molecular structure of the title polymeric complex, {[Ag2Cl(CH4N2S)2]NO3}n, consists of a binuclear cationic complex and a nitrate counter-ion. The cationic complex contains two bridging thiourea (Tu) ligands and a triply bridging μ3-Cl anion. The latter is probably released from 2-aminoethanethiol hydrochloride during the synthesis. The coordination environment around the two AgI atoms is different; one is trigonal planar, being coordinated by two thiourea ligands through the S atoms and to one Cl− ion, while in the other the AgI atom is tetrahedrally coordinated by two thiourea ligands through the S atoms and to two Cl− ions. These units aggregate through the Cl− anion and the Tu S atoms, forming a chain propagating in [100]. In the crystal structure, the polymeric chains are linked via N—H...O and N—H...Cl hydrogen bonds, forming a double layer two-dimensional network propagating in (011).

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    ABSTRACT: Single crystals of tris(thiourea)silver(I) nitrate have been grown by slow evaporation solution growth technique from an aqueous solution at 25 °C. The single crystal X-ray diffraction study reveals that the crystal belongs to tetragonal system and cell parameters are a = b = 14.2790(4) Å, c = 24.8900(7) Å, and V = 5074.8(2) Å3. The various functional groups present in the molecule are confirmed by Fourier transformed infrared spectroscopy (FT-IR). The structure and the crystallinity of the materials were further confirmed by powder X-ray diffraction analysis. Thermogravimetric and differential thermal analysis reveal the purity of the sample and no decomposition is observed up to the melting point. The crystal is further characterized by UV–Vis and Vickers microhardness analysis.
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