С2Н6=С2Н4+ Н2
С2Н4+ HCl= C2H5Cl
2C2H5Cl+ 2Na= C4H10+ 2NaCl
C4H10= CH3CH=CH-CH3+ H2
CH3CH=CH-CH3+ Hcl=CH3CHCl-CH2-CH3
С2Н6=С2Н4+ Н2
С2Н4+ HCl= C2H5Cl
2C2H5Cl+ 2Na= C4H10+ 2NaCl
C4H10= CH3CH=CH-CH3+ H2
CH3CH=CH-CH3+ Hcl=CH3CHCl-CH2-CH3