A new three-dimensional CdII supramolecular framework constructed from the 1-[(1H-tetrazol-5-yl)methyl]-1,4-diazoniabicyclo[2.2.2]octane ligand

A new tetrazole-metal supramolecular compound, di-mu-chlorido-bis(trichlorido{1-[(1H-tetrazol-5-yl-kappa N-2)methyl]1,4-diazoniabicyclo[2.2.2]octane}cadmium(II)), [Cd-2(C8H16-N-6)(2)Cl-8], has been synthesized and structurally characterized by single-crystal X-ray diffraction. In the structure, each Cd-II cation is coordinated by five Cl atoms (two bridging and three terminal) and by one N atom from the 1-[(1H-tetrazol-5-yl)-methyl]-1,4-diazoniabicyclo[2.2.2]octane ligand, adopting a slightly distorted octahedral coordination geometry. The bridging bicyclo[2.2.2]octane and chloride ligands link the Cd-II cations into one-dimensional ribbon-like N-H center dot center dot center dot Cl hydrogen-bonded chains along the b axis. An extensive hydrogen-bonding network formed by N-H center dot center dot center dot Cl and C-H center dot center dot center dot Cl hydrogen bonds, and interchain pi-pi stacking interactions between adjacent tetrazole rings, consolidate the crystal packing, linking the poymeric chains into a three-dimensional supramolecular network.