Al4C3-->CH4-->CH3Cl-->C2H6-->C2H4-->C2H4Br2

Al4C3+12H2O=4Al(OH)3+3CH4CH4+Cl2=CH3Cl+HCl2CH3Cl+2Na=C2H6+2NaClC2H6=c2H4+H2C2H4+Br2=C2H4Br2

Al₄C₃+12H₂O=4Al(OH)₃↓+3CH₄↑CH₄+Cl₂=[hv]=CH₃Cl+HCl2CH₃Cl+2Na=[t]=C₂H₆↑+2NaClC₂H₆=[Ni,p,t]= CH₂=CH₂+H₂↑CH₄+Br₂=[hv]= CH₂(Br)-CH₂(Br)