catena-Poly[[dichloridomercury(II)]-μ-1-(2-pyridylmethyl)-1H-benzotriazole]: the effect of different metal centers on the self-assembly of coordination complexes

To further investigate the relationship between the structures of benzotriazol-1-yl-based pyridyl ligands and their complexes, a new linear one-dimensional Hg-II coordination polymer, [HgCl2(C12H10N4)](n), with the 1-(2-pyridylmethyl)1H-benzotriazole (L) ligand was obtained through the reaction of L with HgCl2. In this complex, each HgII center within the one-dimensional chain is coordinated by two chloride anions as well as by one pyridine and one benzotriazole N-atom donor of two distinct L ligands in a distorted tetrahedral geometry, forming a linear one-dimensional chain running along the [010] direction. Weak C-H center dot center dot center dot pi and pi-pi stacking interactions link the one-dimensional motifs to generate an overall two-dimensional network parallel to the ( 100) plane. Comparison of the structural differences with previous findings suggests that the presence of different metal centers may plays an important role in the construction of such supramolecular frameworks.