The growth of solid state chemistry contribute to wide research of inorganic, organic and metal organic compounds. Metal carboxylates are formed by the coordination of metal with ligands, and they play a significant role in technological application. Formation of complexes with metal carboxylates in future can have a potential wide spread application, as they show to have a interesting magnetic properties. In this thesis 20 novel metal carboxylates were prepared. For syntheses iron(III), copper(II) salts, acetic and benzoic acid, and guanidine and hexamine as templates were used.Compounds were characterized by Foulier-transform infrared spectroscopy (FT-IR spectroscopy), termogravimetry and differential scanning calorimeter analysis (TG/DSC) and single crystal X-ray diffraction. Compounds obtained in reactions of copper (II), guanidine and benzoic acid (CuGUABA) and iron (III), hexamine and acetic acid (FeHEXBA) were crystalized and molecular and crystal structure were determined. Compound FeHEXOK is trinuclear iron(III) complex with hexamine incorporated in crystal structure while CuGUABA is binuclear copper(II) complex with benzoic anion as ligand with molecular structure typical for copper carboxylates (paddle-wheel structure). Both of these complexes have an interesting structure with promising magnetics properties. More interesting and novel idea considering metal carboxylate complex is insertion of some kind of neutral molecule, such as hexamine and guanidine, that act like a template, in the structure of complexes. These neutral molecules can influence inter- and intra molecular interaction and magnetic properties.