Molecular chairs, zippers, zigzag and helical chains: chemical enumeration of supramolecular isomerism based on a predesigned metal-organic building-block

A predesigned metal - organic building- block [Cu-I(2-pytz)] (2-Hpytz = 3,5- di- 2- pyridyl- 1,2,4- triazole) has been successfully used to synthesize four genuine supramolecular isomers.