Author/Authors :
Öztürkkan Özbek, Füreya Elif Department of Chemical Engineering - Faculty of Engineering and Architecture - Kafkas University, Kars, TURKEY , Sertçelik, Mustafa Department of Chemical Engineering - Faculty of Engineering and Architecture - Kafkas University, Kars, TURKEY , Taşdemir, Erdal Department of Chemistry - Faculty of Sciences and Arts - Kafkas University, Kars, TURKEY , Hökelek, Tuncer Department of Physics - Hacettepe University, Beytepe, Ankara, TURKEY , Çatak Çelik, Raziye Scientific and Technological Application and Research Center - Aksaray University, 68100 Aksaray, TURKEY , Necefoğlu, Hacali Department of Chemistry - Faculty of Sciences and Arts - Kafkas University, 36100 Kars, TURKEY
Abstract :
A new manganese(II) complex containing p-hydroxybenzoate and caffeine ligands, namely [Mn(OH-C6H4COO)2(H2O)4].2(C8H10N4O2).8H2O has been prepared. The synthesized complex has been characterized by elemental analyses, FT-IR spectroscopy, X-ray crystallography, and molar conductance measurements. The thermal properties of the complex were analyzed by TGA/DTA. The complex crystallizes in the monoclinic space group P21/c having cell dimensions a=11.1311(2), b=14.3579(3), c=13.5383(3) Å, β=101.879(2)º, V=2117.34(8) Å3, Z=2. In the mononuclear complex, Mn atom is coordinated by two p-hydroxybenzoate anions and four water molecules. Moreover, the asymmetric unit of the complex also contains four uncoordinated water molecules and one caffeine ligand. Crystal structure of the complex have 3D supramolecular networks formed via O-HOH···Ocaf, O-Hw···Ow, O-Hw···Ncaf, O-Hw···Ocaf and O-Hw···Ocar hydrogen bonds.
Keywords :
Supramolecular crystal structure , p-hydroxybenzoic acid , Caffeine , Mn(II)
