Two unique (4,5,6)-connected 2D CdII coordination polymers based on the 5-nitro-1,2,3-benzenetricarboxylate ligand

Abstract

Two new 2D coordination polymers, [Cd₃(nbta)₂(H₂O)₄] (1) and [Cd₃(nbta)₂(bbi)₂H₂O)₂] (2) (H₃nbta = 5-nitro-1,2,3-benzenetricarboxylate, bbi = 1,1′-(1,4-butanediyl)bis(imidazole)) have been synthesized and structurally characterized by single X-ray structure analysis. The versatile conformations and binding modes of the nbta ligand as well as the coordination environment of the Cd^II atoms result in two unique (4,5,6)-connected 2D Cd^II-coordination polymers, both of which show enthralling helical structures.