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The asymmetric unit in the title compound, {[Ag(C 12 H 12 N 2 S)]·NO 3 }  n  or {[Ag L ]·NO 3 }  n  , L = bis-(pyridin-3-ylmeth-yl)sulfane, consists of an Ag I cation bound to a pyridine N atom of an L ligand and an NO 3  - anion that is disordered over two orientations in an 0.570 (17):0.430 (17) occupancy ratio. Each Ag I cation is coordinated by two pyridine N atoms from adjacent L ligands to form an infinite zigzag chain along [110]. In addition, each Ag I ion binds to an S donor from a third L ligand in an adjacent parallel chain, resulting in the formation of a twisted-ribbon type of double-stranded chain propagating along the [110] or [1-10] directions. The Ag I atom is displaced out of the trigonal N 2 S coordination plane by 0.371 (3) Å because of inter-actions between the Ag I cation and O atoms of the disordered nitrate anions. Inter-molecular π-π stacking inter-actions [centroid-to-centroid distance = 3.824 (3) Å] occur between one pair of corresponding pyridine rings in the double-stranded chain. In the crystal, the double-stranded chains are alternately stacked along the c axis with alternate stacks linked by inter-molecular π-π stacking inter-actions [centroid-to-centroid distance = 3.849 (3) Å], generating a three-dimensional supra-molecular architecture. Weak inter-molecular C-H⋯O hydrogen bonds between the polymer chains and the O atoms of the nitrate anions also occur.

acta crystallographica. section e, crystallographic communications

Crystal structure of a twisted-ribbon type double-stranded AgIcoordination polymer:catena-poly[[silver(I)-μ3-bis(pyridin-3-ylmethyl)sulfane-κ3N:N′:S] nitrate]