1) H3C-CH2-CH3 (X1) + Br2 (+hv) = H3C-CH(Br)-CH3 (2-бромпропан) + HBr;
2) 2H3C-CH(Br)-CH3 + 2Na (0 C, ТГФ) = H3C-CH(CH3)-CH(CH3)-CH3 (2,3-диметилбутан) + 2NaBr;
3) H3C-CH(CH3)-CH(CH3)-CH3 + Br2 (+hv) = H3C-C(Br)(CH3)-CH(CH3)-CH3 (X2) + HBr;
4) H3C-C(Br)(CH3)-CH(CH3)-CH3 + KOH (спирт. р-р) = H3C-C(CH3)=C(CH3)-CH3 (X3) + KBr + H2O;
5) 3H3C-C(CH3)=C(CH3)-CH3 + 2KMnO4 + 4H2O (0 C) = 3H3C-C(CH3)(OH)-C(CH3)(OH)-CH3 (X4) + 2KOH + 2MnO2.