Hydrothermal syntheses and structures of three novel coordination polymers assembled from 1,2,3-triazolate ligands

Abstract

Three new coordination polymers with 1,2,3-triazolate ligands, [Cd3(ta)3Cl3]n (1), {[Cd3(ta)6]·6H2O}n (2) and [Cu6(ta)3I3]n (3) (Hta = 1,2,3-triazole), have been hydrothermally synthesized and structurally characterized. In complex 1, the Cd2+ and Cl− ions form a 3D [(Cd3Cl3)3+]n inorganic framework with (82.12)(4.8.10) topology while the Cd2+ ions and ta− ligands give a {[Cd3(ta)3]3+}n double helical chain. The two moieties are fused with each other by sharing “hinge” Cd2+ ions leading to a 3D organic–inorganic hybrid structure. The 3D porous metal–organic framework of complex 2 shows the topology of the diamond net with the Cd-centered CdCd4 tetrahedron units as the connecting nodes. The desolvated structure of 2 has 48% solvent accessible space of the total volume. Complex 3 is an undulating 1D organic–inorganic hybrid complex consisting of interesting discrete five-capped [Cu6I5]− triangular prism clusters and arched metallacycle [Cu6(ta)6I]+ moieties.