Crystal structure of a twisted-ribbon type double-stranded AgI coordination polymer: Catena-poly-[[silver(I)-μ3-bis(pyridin-3-ylmethyl)sulfanej κ3N:N00:S] nitrate]

초록

The asymmetric unit in the title compound, {[Ag(C₁₂H₁₂N₂S)]πNO₃}_n or {[AgL]πNO₃}_n, L = bis(pyridin-3-ylmethyl)sulfane, consists of an AgI cation bound to a pyridine N atom of an L ligand and an NO₃- anion that is disordered over two orientations in an 0.570 (17):0.430 (17) occupancy ratio. Each AgI cation is coordinated by two pyridine N atoms from adjacent L ligands to form an infinite zigzag chain along [110]. In addition, each AgI 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 [110] directions. The AgI atom is displaced out of the trigonal N₂S coordination plane by 0.371 (3) Å because of interactions between the AgI cation and O atoms of the disordered nitrate anions. Intermolecular π-π stacking interactions [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 intermolecular π-π stacking interactions [centroid-to-centroid distance = 3.849 (3) Å], generating a three-dimensional supramolecular architecture. Weak intermolecular C-H⋯O hydrogen bonds between the polymer chains and the O atoms of the nitrate anions also occur. © 2017 International Union of Crystallography. All rights reserved.

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