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1ст.: CH3-CH2-CH3 + Br2 - hn> CH3-CH(Br)-CH3 + HBr| 2ст.: CH3-CH(Br)-CH3 + Br2 - > CH2(Br)-CH(Br)-CH3 + HBr| 3ст.: CH2(Br)-CH(Br)-CH3 + Br2 - > CH2(Br)-CH(Br)-CH2(Br) + HBr| 4ст.: CH2(Br)-CH(Br)-CH2(Br) + Br2 - > CH2(Br)-CH(Br)-CH(Br2) + HBr| 5ст.: CH2(Br)-CH(Br)-CH(Br2) + Br2 - > CH(Br)-CH(Br)-C(Br3) + HBr| 6ст.: CH2(Br)-CH(Br)-C(Br3) + Br2 -> CH(Br)-C(Br2)-C(Br3) + HBr| 7ст.: CH2(Br)-C(Br2)-C(Br3) + Br2 - > CH(Br2)-C(Br2)-C(Br3) + HBr| 8ст:. CH(Br2)-C(Br2)-C(Br3) + Br2 - > C(Br3)-C(Br2)-C(Br3) + HBr|