catena-Poly[[[bis(thiocyanato-κN)zinc(II)]-μ-1,2-bis{[2-(2-pyridyl)-1H-imidazol-1-yl]methyl}benzene] 0.28-hydrate]

Abstract

The title one-dimensional coordination polymer, {[Zn(NCS)2(C24H20N6)2]·0.28H2O}n, was obtained by the reaction of Zn(OAc)2·2H2O, KSCN and 1,2-bis{[2-(2-pyridyl)-1H-imidazol-1-yl]methyl}benzene (hereafter L). The ZnII ion shows a distorted octahedral coordination geometry and is coordinated by two N atoms from two SCN− anions and four N atoms from two organic ligands. The L ligands act as bridging bis-chelating ligands with cis coordination modes at the ZnII ion. One-dimensional coordination polymers are arranged into layers by π–π stacking interactions between the imidazole rings of adjacent chains, with an interplanar distance of 3.46 (1) Å and centroid–centroid distances of 3.8775 (16) Å. One of the thiocyanate ligands is disordered over two positions with an occupancy factor of 0.564 (3) for the major component. The partially occupied water molecule forms an O—H...S hydrogen bond with the disordered thiocyanate group.