NOVEL Co(II) AND Cd(II) COMPLEXES WITH NON-STEROIDAL ANTI-INFLAMMATORY DRUGS Synthesis, properties and thermal investigation

New metal(II) complexes with empirical formulae Co(ibup)(2)center dot 4H(2)O, Cd(ibup)(2)center dot 3H(2)O, Co(nap)(2)center dot H2O, Cd(nap)(2)center dot 3H(2)O (where ibup=(CH3)(2)CHCH2C6H4CH(CH3COO-) and nap= CH3O(C10H6)CH(CH3COO-)) were isolated and investigated. The complexes were characterized by elemental analysis, molar conductance, IR spectroscopy and thermal decomposition. The thermal behavior was studied by TG, DTG, DTA methods under non-isothermal conditions in air atmosphere. The hydrated complexes lose water molecules in first step. All complexes decompose via intermediate products to corresponding metal oxides CoO and CdO. A coupled TG-MS system was used to detect the principal volatile products of thermolysis and fragmentation processes of Co(nap)(2)center dot H2O. The IR spectra of studied complexes revealed also absorption of the carboxylate group. Principal concern with the position of asymmetric, symmetric frequencies. The value of their separation allow to deduce about type of coordination these groups.