Taşdemir, ErdalÖzbek, ElifSertçelik, MustafaHökelek, TuncerÇelik Çatak, RaziyeNecefo?lu, Hacali13.07.20192019-07-2913.07.20192019-07-2920160022-28601872-8014https://doi.org/10.1016/j.molstruc.2016.05.006https://hdl.handle.net/20.500.12451/5968Three novel complexes Co(II), Ni(II) and Zn(II) containing p-hydroxybenzoates and caffeine ligands were synthesized and characterized by elemental analysis, FT-IR and UV-vis Spectroscopy, molar conductivity and single crystal X-ray diffraction methods. The thermal properties of the synthesized complexes were investigated by TGA/DTA. The general formula of the complexes is [M(HOC6H4COO)(2)(H2O)(4)]center dot 2(C8H10N4O2)center dot 8H(2)O (where: M: Co, Ni and Zn). The IR studies showed that carboxylate groups of p-hydroxybenzoate ligands have monodentate coordination mode. The M2+ ions are octahedrally coordinated by two p-hydroxybenzoate ligands, four water molecules leading to an overall MO6 coordination environment. The medium-strength hydrogen bondings involving the uncoordinated caffeine ligands and water molecules, coordinated and uncoordinated water molecules and p-hydroxybenzoate ligands lead to three-dimensional supramolecular networks in the crystal structures.eninfo:eu-repo/semantics/embargoedAccessMetal ComplexP-hydroxybenzoic AcidCaffeineX-ray DiffractionSupramolecular FrameworkArticle111947247810.1016/j.molstruc.2016.05.006Q1WOS:000378360000056N/A