Abstract
The reaction of mercury(II) chloride with bis-(pyridin-3-ylmeth-yl)sulfane (L, C12H12N2S) in methanol afforded the title crystalline coordination polymer catena-poly[[di-chlorido-mercury(II)]-μ-bis-(pyridin-3-ylmeth-yl)sulfane-κ2N:N'], [HgCl2L] n . The asymmetric unit consists of one HgII cation, one L ligand and two chloride anions. Each HgII ion is coordinated by two pyridine N atoms from separate L ligands and two chloride anions. The metal adopts a highly distorted tetra-hedral geometry, with bond angles about the central atom in the range 97.69 (12)-153.86 (7)°. Each L ligand bridges two HgII ions, forming an infinite -(Hg-L) n - zigzag chain along the b axis, with an Hg⋯Hg separation of 10.3997 (8) Å. In the crystal, adjacent chains are connected by inter-molecular C-H⋯Cl hydrogen bonds, together with Hg-Cl⋯π inter-actions [chloride-to-centroid distance = 3.902 (3) Å], that form between a chloride anion and the one of the pyridine rings of L, generating a two-dimensional layer extending parallel to (101). These layers are further linked by inter-molecular C-H⋯π hydrogen bonds, forming a three-dimensional supra-molecular network.
Highlights
The reaction of mercury(II) chloride with bis(pyridin-3-ylmethyl)sulfane (L, C12H12N2S) in methanol afforded the title crystalline coordination polymer catena-poly[[dichloridomercury(II)]--bis(pyridin-3-ylmethyl)sulfane-2N:N0 ]
The asymmetric unit consists of one HgII cation, one L ligand and two chloride anions
Each HgII ion is coordinated by two pyridine N atoms from separate L ligands and two chloride anions
Summary
The structural topology of coordination polymers generated from the self-assembly of transition metal ions and organic molecules functioning as spacer ligands depends mainly on the structures of the spacer ligands and the coordination geometries adopted by the metal ions. The flexibility, length and coordinating ability of the spacer ligands exert strong influences on the formation of coordination polymers and their resulting diverse topologies 2011; Liu et al 2011) For this reason, both rigid and flexible dipyridyl-type spacer ligands with strong coordinating ability and functional characteristics have been widely used to construct a variety of coordination polymers with interesting structures and attractive potential applications in material science (Silva et al, 2015; Furukawa et al, 2014; Wang et al., 2012). Our group has synthesized the flexible dipyridyl-type ligand bis(pyridine-3-ylmethyl)sulfane (L), and has reported its AgI and CoII coordination polymers (Moon et al, 2017a,b). We describe its structure, which involves a one-dimensional zigzag-chain
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