An inorganic–organic hybrid zinc phosphite framework with unusual topology

Employing piperazine (= ppz) as a bridging ligand, a new three-dimensional (3D) inorganic–organic hybrid zinc phosphite framework [Zn2(HPO3)2(ppz)]n (1) has been synthesized hydrothermally and structurally characterized by single crystal X-ray diffraction. The structure of 1 features a pillared-layer framework with unusual (3,4)-connected dmc topology. The results demonstrate that it is possible to add organic ligands into an open zinc phosphite framework for the construction of hybrid materials.