Abstract The synthesis, characterization and exceptional activity of Cu I (TPMA) Br [TPMA= tris (2-pyridylmethyl) amine] and [Cu II (TPMA) Br][Br] complexes in ATRA reactions of polybrominated compounds to alkenes in the presence of reducing agent (AIBN) was reported.[Cu II (TPMA) Br][Br], in conjunction with AIBN, effectively catalyzed ATRA reactions of CBr 4 and CHBr 3 to alkenes with concentrations between 5 and 100 ppm, which is the ...