1D Looped Chain, 1D Tube-like Chain, and 3D Inorganic–Organic Hybrid Coordination Polymers Assembled from 1,6-Di(triazole-1-yl-methyl)-4-R-phenol and Cadmium(II) Thiocyanate

Reaction of ligands, 1,6-di(triazole-1-yl-methyl)-4-R-phenol [dttp (R = t-Bu), dtmp (R = Me), dtcp (R = Cl)], with Cd(SCN)2 leads to the formation of various coordination polymers with different structures. Coordination polymer [Cd(dttp)2(SCN)2] (1) possesses a one-dimensional (1D) looped chain running along the c-axis, while isostructural polymers [Cd(dtmp)(SCN)2·CH3OH] (2) and [Cd(dtcp)(SCN)2·CH3OH] (3) feature a novel 1D tube-like chain running along the a-axis. Distinct assemblies are observed in 1, 2, and 3 due to the spatial hindrance of different substituted groups bonded to the phenol rings. In contrast, 1,6-di(triazole-1-yl-methyl)-4-chlorophenol (dtcp) with Cd(SCN)2 under a solvothermal reaction condition yields a remarkable and unique three-dimensional (3D) polymer [Cd(dtcp)(SCN)2] (4).