Synthesis and Biological Activity and Thermal Analysis of Sulfaquinoxaline Mixed Metal Complexes

Abstract

New mixed sulfaquinoxaline metal complexes were synthised by reacting sulfanomide ligand with transition metals which were as chlorides (Cr(III), Mn(II), Co(II), Cu(II), Hg(II), Fe(III), Zn(II), Cd(II), Ni(II)). The nine mixed complexes of sulfaquinoxaline is prepared by reflux method and determined by CHN analysis and IR. The results of IR spectral data showed that the binding of metals to the sulfonamidic nitrogen, oxygen of sulfone group and nitrogen of amino group .The geometries of all complexes are octahedral and that proved by magnetic measurements and spectral data. The thermogravimetric analysis (TGA) of mixed metal sulfaquinoxaline complexes and DTA that used to determine thermodynamic parameters of the thermal decomposition steps, Ea, ∆H*and ∆S* are carried out from ambient temperature to 700°C in inert nitrogen atmosphere.