Structural Diversity of Six Coordination Polymers Based on the Designed X-Shaped Ligand 1,1,1,1-Tetrakis[(3-pyridiniourea)methyl]methane

In this study, six coordination polymers (CPs), {[Ag(2)(L)(CF(3)SO(3))]·CF(3)SO(3)·2H(2)O·DMF}(n) (1), {[Ag(L)]·SbF(6)·4DMF·H(2)O}(n) (2), {[Zn(L)(0.5)(I)(2)]·3.75H(2)O}(n) (3), {[Cd(2)(L)(I)(4)(H(2)O)(DMF)]·4H(2)O·3DMF}(n) (4), {[Hg(2)(L)(I)(4)]·H(2)O·4DMF}(n) (5) and {[Hg(2)(L)(Cl)(4)]·2H(2)O·3DMF}(n) (6), were obtained based on the designed X-shaped urea-based ligand. X-ray single crystal diffraction analysis revealed that complex 1 displayed a 3D (3,4)-connected {6·8(2)}{6(4)·8(2)}-tcj net. Complex 2 featured a 2D 4-connected {4(3)·6(3)} sheet. Complexes 3 and 5 exhibited a 1D polymeric loop chain. Complex 4 displayed a 1D polymeric fishbone chain. Complex 6 showed a 2D 4-connected {4(4)·6(2)}-sql sheet. Structural comparison revealed that not only the metal ions, but also the anions played crucial roles in the control of final structures.