In this paper we report the synthesis and characterization of tetraethyldiethylenetriamine tribromide magnetic nanoparticles, (MNPs-TEDETA tribromide) as a new catalyst for the high yielding and room temperature one-pot procedure for the oxidation of sulfides to sulfoxides and oxidative coupling of thiols to disulfides. The synthesized catalyst was recognized by FT-IR, TGA, XRD and EDX analyses.