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 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 [1-10] directions. The AgI atom is displaced out of the trigonal N2S coordination plane by 0.371 (3) Å because of inter-actions between the AgI 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.
Highlights
{[AgL]NO3}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 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
The continuing interest in dipyridyltype-ligand-based AgI coordination polymers prompted us to investigate the use of the ligand bis(pyridin-3-ylmethyl)sulfane (L), which can coordinate to three AgI cations in a
Summary
Among the diverse key factors in the development of AgI coordination polymers, the structures of the spacer ligands play important roles in determining the structural topology of the self-assembled polymer units (Zheng et al, 2009; Liu et al., 2011). For this reason, continuous efforts have focused on the design and development of such suitable ligands. We have reported several AgI coordination polymers with interesting structures using dipyridyl-type ligands (Lee et al, 2012, 2015; Moon et al, 2015, 2016; Park et al, 2010).
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