catena-Poly[[dichloridomercury(II)]-micro-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, [HgCl(2)(C(12)H(10)N(4))](n), with the 1-(2-pyridylmethyl)-1H-benzotriazole (L) ligand was obtained through the reaction of L with HgCl(2). In this complex, each Hg(II) 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...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.