С3Н4 + 2Cl2 → С5Н10 + НBr → С4Н6 + О2 → С6Н6 + Сl2 FeCl3→
1) CH4 + Cl2 = CH3Cl + HCl 2) C5H10 + HBr = C5H9Br + H2 3) C4H6 + 5,5O2 = 4CO2 + 3H2O 4) C6H6 + Cl2 _FeCl3_ = C6H5Cl + HCl