Crystal structure of a twisted-ribbon type double-stranded Ag^I coordination polymer: catena-poly[[silver(I)-?₃-bis-(pyridin-3-ylmeth-yl)sulfane-?³N:N':S] nitrate].

ABSTRACT: The asymmetric unit in the title compound, {[Ag(C₁₂H₁₂N₂S)]·NO₃} _n or {[AgL]·NO₃} _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 NO₃^- 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 N₂S 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 ?-? 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 ?-? 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.

SUBMITTER: Moon SH 

PROVIDER: S-EPMC5730324 | biostudies-literature | 2017 Oct

REPOSITORIES: biostudies-literature