Eight-connected coordination framework supported by tricopper(II) secondary building blocks

In a series of coordination polymers based upon 4,4′-bitriazole (btr) [Cu3Cl2(H2O)2(btr)4]2(ZnCl4)2(Cl3ZnOZnCl3), [Cu3Cl2(H2O)2(btr)4](MCl4)2 (M = Cd; Hg), eight-connected metal-organic frameworks related to a CsCl (bcu) structure originate in the functionality of trinuclear copper/chloride ensembles bridged by the organic ligands. [Cu3Cl4(btr)4]Cl2 complex adopts simpler 1D polymeric structure also incorporating trinuclear copper/chloride clusters.