Supramolecular and Coordination Polymer Complexes Supported by a Tripodal Tripyridine Ligand Containing a 1,3,5-Triethylbenzene Spacer

By combining a tripodal tripyridine ligand containing a 1,3,5-triethylbenzene spacer (L) with several divalent transition-metal
chlorides, we have selectively prepared a capsule-type supramolecular complex, [PdII3(L)2Cl6]·2H2O, and one-dimensional (1D)
coordination polymer complexes, ([CuII(L)Cl2]·C2H5OH)n, ([CoII3(L)2Cl6]·2CH2Cl2)n, and ([ZnII3(L)2Cl6]·2H2O)n, with a zigzag polymer
chain, a linear polymer chain, and a ladder polymer chain structure,
respectively. All the structures were established in detail by single-crystal X-ray diffraction analysis, and the factors inducing the
structural differences among the complexes are discussed by taking
account of the differences in coordination geometry (square planar
vs tetrahedral) as well as metal−ligand binding strength in the
complexes.