Supramolecular Architectures of Metal-Containing Macrocycles and a One-Dimensional Supramolecular Structure Based on a Flexible Ligand with an Azobenzene Group

Three new supramolecular structures, [(CuCl)2L2](Cl)2·3H2O (1), [(CuBr)2L2](Br)2·3.5H2O (2), and L·2HClO4 (3),
have been prepared by ligand L (L = 2-py-CH2NHOCPhNNPhCONHCH2-py-2, py = pyridine) with CuCl2, CuBr2, and HClO4,
respectively. The crystal structures of 1−3 have been determined by single-crystal X-ray diffraction. Both 1 and 2 form interesting
[2+2] rectangular macrocycles whose sizes are ca. 15.968 Å × 5.345 Å and 16.007 Å × 5.256 Å, respectively. 3 forms a one-dimensional supramolecular structure.