Structural diversity of copper(II) coordination polymers based on tosylated isophthalic ligands

Article abstract of DOI:10.1002/zaac.201300195

Two tosylated isophthalic ligands, namely, 5-tosyloxy-isophthalic acid (H₂toip) and 5-tosylamino-isophthalic acid (H₂taip) were synthesized. Self-assembly of Cu^II ions with H₂toip and H₂taip ligands under different reaction conditions (temperature, solvents, and auxiliary ligands) gave rise to three coordination polymers formulated as [Cu(toip)(py)₂]_n (1), [Cu ₆(toip)₆(H₂O)₆]_n· 8n(H₂O) (2), and [Cu₆(taip)₆(py) ₄(dmf)₂]_n·n[(dmf)₆(MeOH) ₂(H₂O)₂] (3) (py = pyridine, dmf = dimethylformamide). Compound 1 is a one-dimensional (1D) coordination polymeric chain. Compounds 2 and 3 are two-dimensional (2D) coordination networks featuring very similar Kagome lattices based on the interconnection of paddle-wheel [Cu₂(COO)₄] secondary building units (SBUs) and toip^2-/taip^2- ligands. However, the arrangement of adjacent Kagome lattices in 2 and 3 are distinct, making them crystallize in different space groups and thereby have different crystal structures. Copyright