Tetraaquabis-[5-(3-pyrid-yl-κN)pyrimi-dine]zinc(II) bis-(trifluoromethanesulfonate): A novel cationic complex and three-dimensional hydrogen-bonded network

The title compound, [Zn(C 9H 7N 3) 2(H 2O) 4](CF 3O 3S) 2, con-tains an octa-hedral [ZnL 2(H 2O)4] 2+ cationic complex with trans geometry (Zn site symmetry ), and each 5-(3-pyridyl)pyrimidine (L) ligand is coordinated in a monodentate fashion through the pyridine N atom. In the extended structure, these complexes, with both hydrogen-bond acceptor (pyrimidine) and donor (H 2O) functions, are linked to each other by inter-molecular water-pyrimidine O - H⋯N hydrogen-bonding inter-actions, resulting in a double chain along the crystallographic a axis. The trifluoro-methane-sulfonate anions are integrated into the chains via O - H⋯O hydrogen bonds between the coordinated water and sulfonate O atoms. These double chains are associated into a novel three-dimensional network through inter-chain water-pyrimidine O - H⋯N hydrogen bonds. The asymmetric ligand plays an important role in constructing this unusual supra-molecular structure. © 2011 International Union of Crystallography.