Supramolecular architectures based on di-, tri- and tetrameric complexes with N,N′-diacylhydrazide ligands

Five new complexes, [Co3(HL1)2(Py)8]·4CH3OH (1), [Ni3(HL1)2(Py)4]2·2DMF (2), [Co3(H2L2)2(Py)8]·2NO3 (3), [Ni2(HL2)(Py)6] (4) and [Cu4(HL2)2(Py)4]·4DMF (5) (H4L1 = N-propionyl-4-hydroxysalicylhydrazide, H44-hopshz; H5L2 = N-(3-carboxy-cis-2-propenoyl)-4-hydroxysalicylhydrazide, H54-hocpshz) have been obtained from two N,N′-diacylhydrazide ligands and characterized by elemental analysis, FT-IR, X-ray diffraction and antimicrobial activities. These di-, tri-, and tetrameric complexes are connected into three-dimensional supramolecular architectures with interesting topologies through O–H⋯O, C–H⋯O and C–H⋯π interactions. 1–3 are linear trimeric complexes with the ligands triply-deprotonated. Topological analysis indicates that they exhibit 2D (4,4), 3D (6,8)-connected (3349526)(3441257647) and 8-connected (42563) net, respectively. 4 and 5 possess dimeric and tetrameric structures, which are extended into 7-connected (33413536) and 4-connected (4,4) net, respectively.