Magnesium complex of tetraazaporphyrin reacted with bromine in glacial acetic acid to give a 1:2 molecular adduct of tetrabromotetraazaporphyrin with bromine. The stability of the adduct in media of different polarities was studied. Zinc complex of tetrabromotetraazaporphyrin was synthesized by reaction of the molecular adduct with zinc acetate in dimethylformamide at 20°C.